Flowey VS Giygas (Undertale VS Mother) Blog

SAVE Your Prayers.

u/BBunny821

u/Filipico_w3

"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive."

-Dalai Lama

Flowey, the genocidal nightmare of the underground.

Giygas, the universal cosmic destroyer.

Everyone deserves love, right? Everyone deserves a chance at hope, the chance at happiness, the chance at... Life. Even for the worst of people, these possibilities can change them as people, perhaps effecting the world in just the right way to make a difference.

Before We Begin...

Both Flowey and Giygas will be analyzed with their original games as the primary source material, with other media included (mostly to specify certain in-universe questions) that don't stray away from any major continuity errors such as the Mother 2 manga and Undertale's alarm clock dialogue. All possible forms and versions of these two characters will be considered in the final verdict as well. Not only does it make this matchup a hell of a lot more debatable, but it's also just more fun to talk about. For clarity, here's a list of the things used/not used in this blog:

Flowey:

Used:

• Undertale
• Undertale Art Book
• Undertale 5th Anniversary Alarm Clock Winter Dialogue

Not Used:

• Deltarune
  

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Giygas:

Used:

• EarthBound Beginnings (Mother)
• EarthBound (Mother 2)
• Mother 3
• Mother 1 & 2 novelizations
• Mother 2: Ness's Adventure Memoirs

Not Used:

• Mother: Invasion From the Unknown
• Mother 2 Game Book

Connections

• Both were born to a nonhuman race (monster and alien), with the root of all their future turmoil coming from unusual/unfortunate childhoods
• People from outside of these races, would be the ones to change their lives the most (Chara, the human, falling into the underground, and a married couple of Maria and George, being abducted from Earth)
• These outsiders became very close to them, even becoming family (Chara becoming Asriel’s best friend and adopted sibling, and Maria going above and beyond to raise her adopted son)
• Their fathers would go off to study a power that would eventually help the main protagonists of the respective stories, and be the downfall of both Asriel and Giegue (Human SOULs and PSI)
• One disastrous event after another, and the families would be torn apart, and the nonhuman races would launch their offensive and declare was/invasion of the human world. (George left his wife behind for Earth, to give the people of Earth the alien’s secrets of PSI, and both Chara and Asriel’s deaths would lead to Asgore and Toriel to split after Asgore revealed what he planned to do)
• Both are immensely powerful, and in their stronger forms becoming terrifying in both physical appearance and as an opponent, with most/all of their attacks being incomprehensible, and only being able to take any significant damage by pure human emotion (Determination and prayers)
• They were defeated by people who were very close to them (Ninten, being Giegue’s nephew, and Frisk being considered by Asriel as his best friend)
• Their deepest desires, beyond all the fighting, war, death, invasion, etc, is to just have a friend, their family back together again, and they are willing to put aside any other desires to get those things back
• The main protagonist refuses to listen, and to defeat them, they use something so very personal against them, that once they realize what’s going on, they can’t help but cry and plead for it to be over (Frisk uses all the previous human souls, who all want to help Asriel just as much, and Ninten and his group begin to sing a lullaby, the same lullaby that his mother used to sing to him)
  
  

Background

Flowey

"Howdy! I'm Flowey. Flowey the Flower!"

The Dreemurs lived a peaceful life in the underground. Asgore, Toriel, and their son Asriel all ruled amongst monster kind like a happy family. Together they ate pies and planted flowers in harmony. Nothing at all could disrupt this bliss they all lived in, being locked underground after the war on humans. One day, a lone human from the above grounds fell into the underground. This human was called Chara. Asriel, in all his kindness, decided to bring Chara into his family, and they decide to adopt them as their own. How sweet. Although they found a new place to call home, Chara didn't exactly want to stay in the underground forever. They truly wanted to harvest a monster's soul to get vengeance on the humans in their past village. After trying to harvest the soul of their adoptive father Asgore, karma struck bad as Chara got poisoned and fell ill. As a dying wish, Chara asked Asriel to see the golden flowers from their home village one last time. With that, Chara died and their soul was absorbed by Asriel. Fulfilling his sibling's last bequest, Asriel made his way to the surface, but was killed by a mob of angry humans in the process. Asriel's body turned to dust and was spread across their parents' garden, leaving only Chara's body behind. Was this a plot from Chara all along? Or was it their true colors finally shining through in their last moments? We may never know. Asgore, struck with grief declared war on the humans once more, splitting from his wife Toriel in the process.

Years pass as humans that fall into the underground are reaped and taken for their SOULs to break the barrier of the underground. Meanwhile Asgore's royal scientist Dr. Alphys, wanting to impress him, imbues one of his golden flowers in his garden with the essence of DETERMINATION. A power that allows a soul to persist after death, that human SOULs carry naturally. These experiments fail time and time again, until one of the flowers mysteriously disappears, and Alphys brings an end to her experiments. One of the golden flowers brought to life by Alphys wakes up in Asgore's garden, with the memories and personality of the lost child Asriel. Unfortunately, this came with a cost. Asriel couldn't feel any empathy at all. His compassion disappeared as he fled from his father, not seeing a reason to live anymore. He tried to end his own life, but couldn't go through with it. Through the strength of his DETERMINATION, Asriel learns the power to reset the timeline, doing it thousands of times and trying everything his mind can think of to feel something. Killing them, befriending them, anything. Throughout these times, Asriel decides to take on a new name. Flowey, letting the years pass by with no interference. Threatened by a newcomer human with the same ability to SAVE and Reset, Flowey watches over them in their time in the underground. He remembers if they kill monsters, spare them, do a little bit of both, becoming an eldritch monstrosity every now and again. Flowey was remembered of his past as Asriel after being spared and saved by this fallen human, Frisk. While Flowey could never learn to be that past version of himself, the little love he found was enough for him to push on.

Giygas

"Perish with the rest of the ugly Earth People."

Maria and George were your typical 1900s family. They met while working in the newspaper industry, having written for the same column, the Mother's Day Times. Falling in love, the two of them lived in the town of Podunk, USA, with the high-high population of 31. One morning George grew weary of black, swirling clouds forming above the hills of the nearby Mt. Itoi. Seemingly, people would come back returning with no memory of what had happened to them. George began to document his findings, but got abducted with Maria in the process. An alien race of an unknown background were kidnapping humans to help them raise their people, more specifically, an alien named Giegue. Maria took kindly to this endeavor, parenting Giegue with all her heart. She sang him eight melodies and loved him like a son. George however, found plans in the mothership that would eventually lead to the conquering of Earth. George took information from the ship and fled back to Podunk, sadly not being able to rescue Maria from the clutches of the aliens. George locked himself in a house in the middle of nowhere, dedicating his research to the psychic abilities of the alien race. Maria spent the rest of her days caring for Giegue, and seemingly passed soon after. Years went by as Giegue grew into an adult, with the order from his species to destroy Earth. During his journey the great-grandson of George and Maria, Ninten, set out with a plan to defeat Giegue and unlock the psychic powers inside himself. Not long into his adventure, Ninten found himself in the dreamlike dimension of Magicant. Its ruler, Queen Mary, asked Ninten and his friends to find the eight parts of a song she once held dear to mend her amnesia. Walking across all of America in very specific locations, finally playing the songs for Queen Mary made her remember her past. It was Maria, with Queen Mary being the physical representation of what was left of her consciousness. Its unknown how Mary got to that point, but as the songs played she faded from existence, now teaching Ninten and his friends what they must do. They trekked up Mt. Itoi and played the eight melodies to Giegue, making him remember his past just like Queen Mary. Giegue was forced to retreat from the Earth, but made a plea to one day return and strike back.

Decades later, Giegue came back to Earth with the same mission, but with different emotions. To make sure he accomplishes his goal this time, Giegue put himself inside of what he calls the Devil's Machine. Not only does it help contain his powers, but it focuses them, too. With this newfound technique he takes on the new name of Giygas. Attacking from the past, only a few living creatures managed to escape his grasp. One of which being Buzz Buzz, a time traveling fly who warned the prophesized one of Giygas's return ten years from then. A young boy from Onett, Ness, is told by Buzz Buzz to visit eight musical sanctuaries to unite his powers with the Earth and put an end to Giygas's tyranny for good. Ness journeyed throughout the land, visiting these sanctuaries with his friends, all while being stalked by Ness's next door annoying neighbor. Porky (or Pokey depending on the translation). Porky was chosen by Giygas as the sole host for his evil doings, growing inside his body like a mental xenomorph of madness, he pushed Porky to make Ness and his friends' life so much worse. Or he could just be a dick. We don't really know. Giygas, sensing his defeat, escaped to the past with Porky, eventually being followed by the four protagonists. Even with the power of a universe on his side, Ness and his friends couldn't debilitate Giygas for good. At this point, Giygas was a being so far removed from human existence that his attacks couldn't even be comprehensible anymore. There was nothing that they could do to stop him. Nothing they could do, but pray. And so they did. They prayed for their safety, and so did the people of Earth itself. Even you did. Yes, you reading this. You helped to defeat Giygas for good, putting him out of his misery. As Porky rolled off into another time, Giygas, originally Giegue, died while understanding love.

Experience & Skill

Flowey

Flowey has tons of experience in the monsters of his world, has studied them for likely years, knows everything about them, using his reset power to do so. He's even said himself that he's read every book in the underground. Every possibility you can imagine him doing, he's likely succeeded (and failed) in doing so. Resetting is a crazy ability for this, but among his already huge knowledge he's a great fighter, being able to sustain strong monsters like Papyrus and Undyne, and even keep up with the likes of Frisk. Not to mention he's a pretty good manipulator, being able to trick Papyrus into being one of the main reasons he got all the human SOULs in the first place. Overall Flowey is an extremely skilled and smart guy, only falling to those who he doesn't see coming.

Giygas

Giygas, after the events of Mother 1, became the most powerful conqueror in the universe, as we learn from Buzz Buzz. More specifically, the Universal Cosmic Destroyer. It's quite a title to behold to someone, even for Buzz Buzz who hates Giygas and wants him destroyed, is willing to admit how powerful he is. Giygas has created hundreds of alien robots with his species powers of PSI, and has technology that far surpasses Earth scientists like Dr. Andonuts and the Mr. Saturns. Not only that, but Giygas is likely the leader of his alien species, or at least one of very high importance. They wouldn't have entrusted him with destroying Earth if he wasn't extremely adept in being a reign of terror like this. This is a problem with a lot of the Mother series' lore, a lot of it is left up to speculation as it's vague in a story sense. But reading between the lines, we can see that Giygas is a clear threat to not only planets, but entire universes. He's smart enough to plan around his opponent's weaknesses, employing or corrupting Porky to make Ness and his friends have a harder time getting to him.

Forms

Flowey

Omega Flowey

After swiping the six SOULs for himself, Flowey turned into this beast of a plant. Signs on the wall of Waterfall tell of when a monster absorbs the SOUL of a human, they become a horrific being with split control between the SOUL and the monster inhibiting it. With it, Flowey becomes almost unstoppable, but ultimately his plan backfires on him when the SOULs started to help Frisk, because they still had caring minds of their own.

The God of Hyperdeath

After tricking the player into luring every monster SOUL in the underground right towards him, Flowey absorbs them all and turns into the God of Hyperdeath, Asriel Dreemurr. In this form his attacks grow stronger, having infinite ATK and DEF, and can only be defeated through pacifism.

Giygas

Sealed in the Devil's Machine

As the Apple of Enlightenment foretold, 10 years in the future Giygas would be defeated by four children. Scared, Giygas locked himself inside the Devil's Machine to contain his PSI abilities. Almost nothing can touch this thing, having a built-in forcefield that reflects attacks.

Unsealed out of the Devil's Machine

When let out of the Devil's Machine, Giygas's mind breaks as he encapsulates an entire dimension, not comprehending his own abilities. This final form was only defeatable via prayers from human kind.

Equipment

Flowey

Six Human SOULs

These are the six souls collected by Asgore to break the barrier, but he was missing one. He never used them in combat, but Flowey does! He uses these to become Omega Flowey, and they all have their own individual abilities, too. However these come with a drawback, as they'll revolt against Flowey if given enough time.

Ribbon

He's so handsome :)

Bombs

Drops a Fat Man on ya. Or a few hundred.

Flame Throwers

*happy muffled noises*

Fingers

Are those... Real fingers?? Gross.

Chaos Saber / Slicer

Asriel manifests these swords in the final fight. They can create tiny little stars when sliced together.

Chaos Buster / Blaster

Summons this blaster that can rain down stars, squares, and a rainbow beam upon his foe.

Giygas

Mothership

The ship Giygas used to imprison hundreds of Earth dwellers, and travel to the ends of the universe. It also has built-in sound nullification, for some reason.

Glass Pods

Giygas used these to trap the citizens of Earth. They're still alive, just in stasis.

Alien Cocoon

This is how Giegue is fought in the first Mother game. Made out of his own bodily fluids, he resides in it to limit his full power.

"Ultimate Reset Button"

This machine can revert reality back to a certain state. It's unknown what this piece of technology truly looks like, but it has the power to reset actions that he's done before. In the novel it's quite literally compared to an RPG mechanic, like saving and resetting a game. (See: Before the Verdict)

Flying Saucers

Giygas's species is able to travel with these and shoot red lightning from them, like seen above.

Apple of Enlightenment

This is not an actual apple, but instead another piece of tech likely connected to Giygas's species in some way. It foretold his defeat at the hands of Ness, but there's some things it can't predict, and it has only been shown to see 10 years into the future.

Evil Mani Mani

This statue had evil influence over those who protected it, controlling them through their mind. It's so powerful that it made people as mentally strong as Ness and Jeff think they were in a completely different reality, and after it was removed from the clutches of Monotoli, it rapidly aged him years in time, or at least made him much weaker.

Mini-Mini Mani Mani

This statue was hidden in a burger stand's water supply, making anyone who drank from it greedy and gluttonous.

Inter-Dimensional Transmitter

Giygas chooses monsters from a catalogue and transports them into the world via dimensional travel.

Phase Distorter

While it was stolen by Porky, this is a time machine used by him and Giygas to reach the ends of time itself. It was crashed and broken in Cave of the Past.

Devil's Machine

The machine Giygas was going to use to focus his powers and destroy the entire universe. He can also use it to become an entire dimension, where even his mind can't comprehend what's happening, destroying his consciousness completely.

Powers & Abilities

Flowey

Social Influencing

Due to resetting the timeline so many times, Flowey has an impeccable sense of how others work. He can solve others problems, manipulate them to do his bidding, or even (attempt to) get the player to never turn the game on again.

Acausality

Remembers when the timeline is reset. He's not completely acausal, though, as logic still applies to him. He's just unaffected by resets the same way most others are.

Mimicry

Can mimic the face and voice of others.

Soul Manipulation

Every attack in Undertale does damage to your SOUL, so this also applies to Flowey.

Non-Physical Interaction

Same reason as above. Due to affecting the SOUL, which is inside someone, he can attack things that are non-physical.

Plant Manipulation

Being a flower connected to the Earth, he can sprout long plant-like tendrils to entangle people with, and can even summon a Venus flytrap to ensnare flies.

Friendliness Pellets

These not-so friendly pellets are actually bullets Flowey uses to kill Frisk. He can spawn these at will and never runs out.

Reality Warping

Able to warp the reality of the game. He changes the text, save file, and whatever else he wants.

Energy Projection

Can summon these X-shaped projectiles from his eyes, and also a laser.

SAVE / LOAD

Flowey can SAVE and LOAD his large array of files he has, acting as a way to control the timeline he's currently in. He gets very creative with this.

Light Blue SOUL Attack

Knives!

Orange SOUL Attack

Gloves!

Blue SOUL Attack

Shoes!

Purple SOUL Attack

Notebooks!

Green SOUL Attack

Pans!

Yellow SOUL Attack

Gun.

Flight

Yep.

Dreemurr Flames

To start out the fight, Asriel sends out the flames that his mother and father use, too.

Star / Galacta Blazing

Pulls stars from the sky to throw at his foe.

Shocker Breaker (I & II)

Can summon lightning from the sky! Of the rainbow variety, of course.

Hyper Goner

He purges the timeline completely, erasing it from existence.

Lost Soul Attacks

Similar to Omega Flowey, Asriel can attack with the abilities of the souls inside of him. He doesn't have much control over this power, though.

Homing Projectiles

These kill the no-hit run.

Giant Laser Blast

This almost gets Frisk down to 1 HP, but couldn't because of their DETERMINATION. Speaking of...

DETERMINATION

DETERMINATION is the most powerful ability in Undertale. Ones with this power can heal from near death, decrease incoming damage, manipulate space time, and even exist without a SOUL, just like Flowey.

Plant Physiology
(as Flowey & Omega Flowey)

Due to not being a human nor a monster, and not having a SOUL, Flowey can absorb SOULs of monsters and humans alike. This can allow him to transform into certain versions of himself.

Boss Monster Physiology
(as the God of Hyperdeath)

When transformed into the God of Hyperdeath, Asriel changes into his original self, which is a Boss Monster. They're stronger than normal monsters and can survive a small while after death compared to normal means.

Resistances / Immunities

Empathic Manipulation
Flowey and Omega Flowey (Immune) (Can't feel love)

Soul Manipulation
Flowey (Immune) (Doesn't have a soul)
Omega Flowey (Resists) (Takes SOUL attacks as physical damage with the human SOULs he has)
God of Hyperdeath (Resists) (Takes SOUL attacks as physical damage with the monster souls he has)

Extreme Heat & Cold
All forms resist (Flowey could reside in Snowdin and Hotland just fine, other forms should compare)

Giygas

Corruption

Throughout his takeover of Earth both times, animals, people, and even inanimate objects start to bend to Giygas's corruption. It doesn't necessarily make people evil, but instead makes the evil in one's mind much more prevalent. Because of this, it doesn't relatively affect people who are good at heart.

Flight

It's likely Giygas can fly/levitate on his own, it's also possible he can just pick himself up with his own psychic powers.

Weather Manipulation

Giygas's species is capable of creating the black clouds we see over Mt. Itoi. These also make people go mad.

Acausality

He would have destroyed the entire universe from the past, thousands of years before his own birth, yet remained unaffected in the present, twisting space and deploying his army to alter history without suffering any change himself.

Spacetime Travel

Giygas has the ability to send his robots (and by extension, himself) through space and time. He even does this with a dinosaur, sending it back to its original time period.

Limited Precognition

In this conversation between Giygas and the Apple of Enlightenment, it tells him certain things about his future. Some things are impossible to predict, however.

Possession

If he so pleases, Giygas can choose to grow inside a suitable host, using their body as a sort of stasis chamber for when he's ready to emerge.

Abstract Existence / Incorporeality

After being put into the Devil's Machine, Giygas became the absolute embodiment of Evil itself, not having a true body or corporeal form.

Forcefield

Can reflect physical, psychic, stat-changing, and status ailment moves when sealed in the machine.

Psycho Barrier

When his presence nears, Giygas sets up a psycho barrier only some can endure mentally.

Illusion Creation

Copying the data of his opponent, Giygas can create illusory replicas of them.

Power Bestowal

We know Giygas's species primarily used PSI, and the only way that Giygas would be able to give NPCs like his robots and minions these abilities is if he had them himself. All the following PSI-based attacks are used by those enemies in some form or another.

PK Beam

This attack with Ω deals high damage, while γ kills the target instantly (only if they're not metallic or a boss).

PSI-Block

Stops the opponent from using PSI for a few turns. Probably will fail because I swear to god this always fails every time I fucking use it and it only has like FIVE PP SO LIKE WHAT'S THE POINT OF-

Darkness

Makes you blind, lowering your accuracy.

PSI Magnet

Drains the PP from the target.

PSI Shield

Nullifies PSI attacks, while protecting the user.

PSI Flash

This targets all enemies and may cause them to suffer from crying, numbness, feeling strange, or be instantly defeated completely. It's all random.

PSI Fire

Deals damage to all enemies in a row. I like spamming this one in Smash.

PSI Thunder

Deals high damage to random enemies.

PSI Freeze

Deals high damage to one foe, with the chance to freeze.

PSI Starstorm

Ness's Final Smash, it's literally described as showering your enemies with a multitude of shooting stars.

PSI Rockin

This is the same attack that Ness wields, dealing a large amount of psychic damage to all enemies.

Shield

Different from PSI Shield, it halves all physical damage for three turns before breaking.

Brainshock

Wrecks the opponent's brain, making them feel a little funny.

Lifeup

At its most powerful, can recover HP for the entire party.

Hypnosis

Puts the foe to sleep.

Paralysis

Paralyzes an enemy, making them not able to make physical attacks.

Inexplicable Attack

An attack unable to be explained or accounted for. It's likely a type of alien attack his species used, as the human party members can't understand it. It deals high-level non-elemental damage to all members of the party.

Incomprehensible Attack

An attack of which its true form cannot be grasped. Has these effects randomly:

• 60-180 points of damage to two random enemies
• 4/8 (50%) chance of crying, 1/8 (12.5%) chance of strangeness, 1/8 (12.5%) chance of paralysis, 2/8 (25%) chance of instant defeat
• 135-225 Freeze-element damage to all enemies with a 25% chance of solidifying the target
  
  

Alien Physiology
(as Giegue & inside the Devil's Machine)

Giegue's species is often referred to as insect-like, they hatch out of an egg, and seem to naturally generate PSI in some way. They also hide in an alien cocoon to contain their powers. Not much else is known, though.

Dimensional Physiology
(unsealed out of the Devil's Machine)

This puts Giygas at a higher-dimensional existence, even greater than Ness when he fused with the universe of Magicant. In this form he quite literally is his own dimension, as seen in external media like shown above, being everywhere all at once.

Resistances / Immunities

Ice, fire, electric, sleep, blindness

All forms immune (Unaffected by most of what the Mother 1 & 2 cast can throw at him, elementally and status-wise)

Support

Flowey

None notable.

Giygas

Starmen

• Starman - The typical forefront of Giygas's army. They can fire beams and use two sudden guts pills that up their attack. Knows PSI Magnet α and Shield α. One was able to disguise as a human, tricking Ninten & co.
• Starman Junior (Mother 1) - Can emanate a high-pitched sound driving animals insane. Knows PK Beam α & γ.
• Starman Junior (Mother 2) - Sent back in time to stop Buzz Buzz. Knows PSI Freeze α and PSI Fire α & β.
• Starman Super - The golden enhanced Starman. They can fire beams and summon other Starmen to help. Knows PSI Shield β and Healing Ω. They also can carry the Sword of Kings, but don't use it in combat
• Last Starman - The strongest Starman in Mother 1. They know PK Beam β & γ.
• Ghost of Starman - The dark Starman that counts down to your defear. They know PSI Starstorm α & Ω.
• Final Starman - Hey! This one's on the box art! They know Shield β, PSI Starstorm α & Ω, Brainshock Ω, and Healing Ω.
• Starman Deluxe - The boss Starman at Stonehenge. It can fire beams and summon other Starmen to help. Knows PSI Shield β and PSI Starstorm α.
  
  

UFOs

• Lil Saucer - Usually found in pairs. Knows PSI Shield α and PSI-Block.
• Omega Saucer - Found amongst Barbots. Knows PSI Beam α and PSI Shield α.
• Li'l UFO - The Lil Saucers but just with eyes. They can fire beams that damage others and cause night-time stuffiness.
• Cute Li'l UFO - Li'l UFOs but with a cute bow on top. They fire beams and know Lifeup α.
• Beautiful UFO - Literally the same as the cute ones but just with more HP. They fire beams and know Lifeup α.
• High-Class UFO - Attacks with annoying speed and accuracy. They can fire beams and disrupt your concentration. Knows PSI Shield α.
  
  

Mooks

• Mook - Has the largest moveset. Knows PSI Freeze α & β, Brainshock, Hypnosis, Paralysis, Darkness, Defense Up α, and Lifeup α.
• Oh-Mook - Same PSI moves as the regular Mook. These guys can just steal items.
• Lesser Mook - Can diamondize others, paralyzing them completely. Knows PSI Freeze α & β and Hypnosis α.
• Mook Senior - A stronger Lesser Mook. Can diamondize people, knows PSI Freeze β, PSI Fire α, Lifeup α.
• Dept. Store Mook - Caused a power outage in the Fourside store. Knows PSI Freeze α, PSI Fire α, Lifeup α, PSI Magnet Ω, and Brainshock α.
  
  

  Mother 1 Robots

• Barbot - A robot around saucers that are made out of thin bars. They only know PK Beam γ.
• Ultra Barbot - Just a stronger Barbot.
• Megaborg - A samurai robot whose armor protects from PSI attacks.
• Giga Borg - A stronger green samurai bot that knows PK Beam α & γ.
• Omega Borg - The strongest samurai that knows PK Freeze Ω, PK Fire β, PK Beam β, PK Beam γ, and PK Thunder γ.
• Nancy, Juana, and Kelly - Three robot sisters, but don't be tricked by their beauty. They'll just attack you.
• R7037 - A huge robot residing in the desert, being able to wipe the party in one hit. It's only capable of being defeated with a tank.
• R7038 - An upgraded model of 7037, and is only capable of being defeated with another tank.
• R7038XX - The strongest enemy in Mother 1. The party is only able to defeat it with the help of EVE, who took this robot down with her. Rest in peace, my goat.
  
  

Mother 2 Robots

• Spinning Robo - Can give the party night-time stuffiness and fire beams. Knows Shield α.
• Whirling Robo - Same abilities as before, but now can use a Neutralizer, nullifying PSI effects.
• Hyper Spinning Robo - They fire beams, disrupt senses, and know Shield β.
• Marauder Octobot - Fires beams, paralyzes foes, and steals their items, too.
• Military Octobot - Same as Marauder, just more durable.
• Mechanical Octobot - Same as Marauder, just stronger.
• Ultimate Octobot - Same as Marauder, just the best one.
• Smilin' Sphere - This maniacally laughing, floating sphere can explode upon death. Knows PSI Fire β.
• Atomic Power Robot - Well endowed, these ones fire beams and can fully heal their friends. They also continue to fight until they're melted down.
• Nuclear Reactor Robot - Same as Atomic, but detonates in a nuclear explosion when defeated.
  
  

Lifeforms

• Bionic Bat, Bionic Scorpion, and Bionic Centipede - Genetically enhanced versions of other animals that are simply stronger than normal ones.
• Titanee - A very large scorpion creature that's hard to take down. They know Hypnosis α.
• Titanian - A cyborg Titanee that's rougher and tougher to take down. If you can beat it, that is great.
• Gabilan - These weird giraffe aliens-from-Sesame-Street-ass creatures can dehydrate you.
• Cerebrum - A brain in a jar with legs. Literally that's what they are. They only attack you bluntly. Because I mean what the hell else is a brain with legs gonna do. Think you to death?
• Gargoyle - Fire breathing, flying creatures. They know PK Fire β.
• Rockoyle - The gargoyle but blue and made out of rock. Literally besides coloration they're the same enemy.
• Wooly Shambler - These are walking shag carpets with tentacle arms. They fire beams and know PSI Shield α and PSI Flash α.
• Wild 'n Wooly Shambler - Now knowing PSI Flash β, these guys are harder to take down.
• Evil Eye - Walking eye creatures at night that can diamondize opponents. They know Paralysis Ω and Brainshock Ω.
  
  

Master Belch

Employed by Giygas, this hot pile of slime was responsible for kidnapping Mr. Saturns and using them in his lair. He also released zombies in Threed and after being defeated, came back as Master Barf. He has his own minions that should technically be under Giygas, too.

Belch's Subjects

• Handsome Tom - Floating puppets puppeteered by a floating hand. They know Hypnosis α and Brainshock α.
• Smilin' Sam - Stronger Handsome Toms. Knows Lifeup α and Defense Down α.
• Urban & Farm Zombie - These rise from the ground and disappear after Belch is defeated. Can make party members catch colds.
• Zombie Dog - Chomps onto anything that moves. Can poison others with its poison fangs.
• Zombie Possessor - An over-the-sheet type ghost that can posses others. Also can freeze them with its icy hand.
• Tiny Li'l Ghost - A ghost so small you can't fuckin' see him. They can just freeze others.
• Smelly Ghost - Red ghosts that appear out of trash cans. Lowers offense and defense with its stench and knows Lifeup α.
• Stinky Ghost - A strong version of the Smelly Ghost, these ones are yellow.
  
  

Feats

Flowey

Overall

• Learned all the knowledge and secrets of the underground
• Took the human SOULs for himself in pure malice
• Tricked every monster in the underground for their SOUL to be absorbed...
• ...Then, in a moment of love, released the SOULs, breaking the barrier completely
  
  

Strength

• Managed to hold back all of Frisk's friends with vines
  
• As Omega Flowey: Able to one-shot Frisk
• As the God of Hyperdeath: Casually destroyed an entire timeline (Universal)
• Able to reset all of the timelines via a True Reset (Multiversal) (Debatable)
  
  

Durability

• Can survive a fire blast from Toriel (As shown above)
• Takes multiple slashes from Chara to be fully killed
• As Omega Flowey: Took an attack from all six SOULs at once
• As Omega Flowey: Via loading saves, not able to be fully defeated until the SOULs started helping Frisk
  
  

Speed

• Able to travel anywhere in the underground, following Frisk throughout their journey
• Moved an entire elevator in a matter of seconds (Subsonic)
• As the God of Hyperdeath: Could still move around in a space where nothing existed anymore, and therefore, time itself didn't exist either (Immeasurable)
  
  

Giygas

Overall

• Became an important member of an alien society
• Has conquered hundreds of planets in the known universe, with few being able to escape him
• Spread his influence throughout time itself
• Assumed the form of the literal embodiment of evil
  
  

Strength

• Support like Last Starman and Barbot can instantly kill someone with PK Beam γ
• Generated clouds over Mt. Itoi (City level)
• Stopped a comet that would've taken out life on Earth
• Is stated multiple times to be able to destroy the universe (Below Average Human) (jk, Universal)
• Out of the Devil's Machine: Even the strongest individuals such as Ness aren't able to comprehend his attacks (As shown above)
• Out of the Devil's Machine: Able to generate shockwaves across infinite realities along the axis of time (Multiversal+) (Debatable)
  
  

Durability

• Maria states that Giygas cannot be defeated with brute strength or ordinary weapons
  
• In the Devil's Machine: Has a barrier that tanks physical and PSI-based attacks, reflecting them back at the foe
• Out of the Devil's Machine: Felt some kind of pain, yet was unharmed by an attack from Ness
• Out of the Devil's Machine: Even after his defenses became unstable, no significant damage could be delt to him
  
  

Speed

• His Mothership was able to travel to the ends of the universe in a matter of two years (MFTL+)
• Out of the Devil's Machine: Became his own dimension (Nigh-Omnipresent)
  
  

Scaling

Flowey

Underground Monsters
(as Flowey)

It's only natural base Flowey would scale to relatively all of the underground monsters, having fought and killed all of them in past timelines.

• Ice Wolf throws ice blocks (64,383 Joules)
• Papyrus ran across his house (16.92 m/s)
• Undyne can suplex a boulder
• Undyne is quick (Mach 3)
• Mettaton breaks through a wall
• Mettaton kick strength (0.04 Tons)
• Sans throwing bones (13.03-15.5 Kilojoules)
• Undyne can survive her house going up in flames (7 Megajoules)
• Knight Knight can summon meteors (6.4 Tons)

Frisk (and Chara?)
(as Omega Flowey & the God of Hyperdeath) 

Due to facing a late-game neutral Frisk as Omega Flowey, and a late-game pacifist Frisk as the God of Hyperdeath, Flowey in both forms scales to them. While it'll be put here for convenience, Flowey in the God of Hyperdeath form could also scale to Chara. (See: Before the Verdict)

• Frisk:
• Can push large rocks
• A single human SOUL's power trumps the entirety of the underground's (7288.803 Tons)
• Can dodge the Great Dog's barks (187.35 m/s)
• Dodged the not-real lasers (Mach 0.9)
• Can react to Tsundereplane who can fly fast (Mach 3-4)
• Can stack Sea Teas to get even faster (Mach 3-6)
• Chara:
• Capable of killing both Toriel and Asgore in a single blow
• Destroyed the entirety of Undertale as a reality, and then recreated it (Multiversal) (See: Cosmology)
  
  

Giygas

Mother 1 Gang
(as Giegue)

Giegue sees the Mother 1 gang as lesser saying "You are like mere insects to me!" And due to the fact that you can barely harm him in the final fight, Giygas should comfortably scale above them.

• Ninten can walk 700m in 13 seconds (54 m/s)
• All can react and dodge Omega Borg's PK Thunder attacks
• Ana shot a beam from her mind compared to a supernova explosion
  
  

Mother 2 Gang
(Lower-end feats: All forms, Higher-end feats: sealed & unsealed)

As Giygas's attacks can't be comprehended by them, and he (in general) couldn't be defeated by them either by normal means, he should obviously scale to the Mother 2 gang.

• Ness, Paula, and Jeff can carry a submarine
• Paula and Poo can freeze a Chomposauraus (25.6 Kilotons of TNT)
• When losing control of his powers, Ness can just casually blow up the fucking sun (Star level)
• Ness, with Teleport, can move across continents in seconds (Mach 3820)
• Ness dodged electricity (Subsonic)
• Poo can perceive every living organism from all of time at once (18 million c)
• All of them can tank a nuclear explosion to the face
• Ness, Paula, and Jeff shake off the Skyrunner explosion (1.1 Tons)
• Ness fused with all of Magicant, which is stated to be a completely different dimension
  
  

Mother 3 Gang
(in all forms)

While Giygas isn't technically in Mother 3, the Mother 3 party should be comparable to the other two groups.

• Lucas dodged a train...
• ...And then got hit by that train (0.005 Tons)
• All of them can dodge rays of light from the K9000 (Relativistic)
• Kumatora, with the help of Salsa, destroyed a tank
• Most should be comparable to Flint, who tanks a tree exploding (113,591 Joules)

Cosmology

Flowey


The Size of Undertale's Multiverse

The main person responsible for the resets of timelines is Flowey, so we can analyze what he's said to get a feel of how many timelines there truly are in Undertale's canon. We know that Flowey has reset hundreds upon hundreds of times, doing truly everything that the underground has to offer. It's to the point where people started to look like NPCs, and he then he started to get bored, his powers transferring onto Frisk. There's not much to say about how many times Flowey needed to reset except saying that's a extremely high number. The manipulation of there being a multiple amount of timelines is supported by Sans stating "timelines jumping left and right, stopping and starting." Confirming that there are indeed multiple timelines and not just one or two. From Omega Flowey's fight, we know that the game can hold up to at least 6 timelines. However, there's more. Let's talk about Gaster. A scientist who fell into his creation and was shattered across space time. Depending on your fun value in the game, you can encounter a consistent presence of Gaster throughout them, and no encounters can be seen in the same fun value. So, these events have to happen across a larger time space continuum. With all of this in mind it basically confirms that the power of Chara and Asriel are comparable to each other, being able to affect a spacetime construct of at least 12 timelines. There's a very good chance it could be a lot bigger as well, but this is the highest it can be calculated without getting into some large speculation. Since, we have no idea how many times Flowey truly could have reset. The timelines he was able to reset go up until at most the thousands. So, great, that clears up at least how powerful the God of Hyperdeath's power could be, right? Well... 

The Possibility of Infinite Timelines

Most like to point to this statement by the Clam Girl, who claims there are an infinite amount of opportunities in the world of Undertale, and there's a few more arguments for there being an infinite amount of timelines. Clam Girl's statement is further explored by Chara stating "Let's erase this pointless world and move on to the next." Before destroying the world of Undertale, then rebuilding it. Again, saying specifically "the world" is infinite and therefore, the timelines are too. The bottom line is, there are consistent arguments for both timeline arguments that can be considered.

Giygas

The Size of Mother's Multiverse

In the manga, it's stated by Jeff, the smartest of the party members that infinite parallel worlds exist unto themselves. Timelines with each decisions are constantly being born and brought into existence, and they exist parallel to one another. This is a very deliberate statement, clearly telling the audience that there exists an expanding amount of infinite universes.

Dark Dragon

This fucking guy. Okay let's get into it. Sleeping under the Nowhere Islands in Mother 3, which when unsealed at the end of the game is awakened and does... Something. We don't exactly know what, but it causes some kind of destruction or apocalypse that ends the entire world. Maybe. Again, it's left up to speculation what actually happens at the end of the game, but it's worth talking about here. Some argue that by the dragon awakening, it can end the entire Mother multiverse and therefore be perhaps scaled to Giygas, since he can do similar things like affect the time axis of it. Within Mother 3 as a whole, the Dark Dragon is likely about to destroy just Mother 3’s universe. There are quite literally 0 implications  about the dragon destroying the multiverse. It's also possible that Mother 3's events could be happening in the Mother 1 and 2 universe instead of being separate one, which makes it more so not a matter of where Mother 3 is happening but more a matter of when. But there's not a very concrete answer for that. Like the end of the game, it's left up to interpretation. Overall it's unclear if the Dark Dragon is capable of the same kind of multiverse-effecting powers like Giygas. If the dragon is, it acts as more evidence that Giygas truly is Multiversal+, but at most, the dragon is still universal.

Weaknesses

Flowey

Flowey suffers from a significant problem of longevity. Ironic, given his time manipulation, but it's sort of where his biggest flaws come from. Whenever a Reset occurs, his LV drops to 0, and has to gain his relative strength back. He relies on outside sources like the SOULs to gain the advantage, but they often backfire in his face like with the SOULs helping Frisk. Or with the God of Hyperdeath, being able to now feel love (and thus remorse) to any opponent he's facing. The right foe could easily manipulate that weakpoint of his, leading to his ultimate downfall. Flowey's experience is also an issue. Sure, he is very smart socially, but it's only limited to the underground, as the barrier prevents him from moving outside of it. What he knows it only what the underground could know. If someone with, say, more varied fighting experience than Flowey came along, and was notably faster, they could easily pose a threat to the little fella.

Giygas

Giygas, even being the indomitable foe that he is, is weak to one thing we all know and love. Love! Compassion is truly what breaks Giygas. Whether it be Maria's song or literal prays from human beings across Earth, people coming together really brings this guy down. While that is applicable to Giygas in all forms, when he becomes unsealed out of the Devil's Machine his mind breaks, not being able to comprehend his madness. If Giygas faced someone with the same dimensionality and with their mind in-tact, that could possibly be debilitating for Giygas. Weirdly enough though, Giygas outside of the Devil's Machine seems to be weak to the move Brainshock. It's a move that makes the opponent feel strange and attack themselves or another opponent, working more and more the higher an opponent's IQ is, and Giygas's should theoretically be 0 if his mind is broken, right? But that's up to interpretation, I suppose. Though theoretically if someone with enough competent mind hax came along, they could effect Giygas and do some real damage.

Before the Verdict

So... Giygas can SAVE / LOAD too?

Short answer, yes. Analyzing the text, before the Reset Button is even talked about, Ana and Ninten get into an argument about wishing how they could reload different points in time like an RPG. And later we learn from EVE that Giegue literally has that ability. Narratively, it works as a point to the reader to show how powerful Giegue truly is. He isn't bound by human consequences, furthering the lack of humanity the novel wants the reader to believe about Giegue, which is what makes the final moment of him remembering Maria so much more emotional. This is done a few other times throughout the novel, but the point of the argument between Ana and Ninten is that consequences matter, and we are who we are because of them. It's a sweet moment, but in a VS sense it quite literally means he can retry the battle at any point he wants. It's described literally as "A machine that can revert the entire world to a state like before one was even born." Meaning it could reset the entire universe to a point where the world didn't exist. As a sort of time machine. This is consistent in the manga with Giygas's ability to send dinosaurs and other animals back and forth in between time. It's not crazy to consider that Giygas can do this normally.

Flowey Scaling to Chara
(in Hyperdeath form)

Asriel can be said to scale to Chara in some aspects, specifically regarding the control and use of save/load functions within the game. However, the extent and nature of the scaling are debated. Both are capable of the same things, like erasing timelines, worlds, etc., so it should be easy to bring Asriel up to Chara's level in terms of being able to erase the multiverse. The only reason that Asriel didn't in the final fight was presumably because both Frisk and Asriel had rivaling DETERMINATION and Asriel ultimately got overpowered. It's only natural that in the Hyperdeath form Flowey would scale to Chara. I mean Chara was quite literally absorbed by Asirel in their final moments, implying a similar level of power even at a young age, so it'll be allowed.

Art Tributes!

u/Z-omar

u/BBunny821

u/No-Sugar-8155

Verdict

Stats

Let's start with strength. In Flowey's base, the peak for strength he can reach is scaling to Knight Knight summoning meteors, which caps out at around Large Building levels of strength. In Giygas's base, he could shatter a comet about to hit the planet. Since it was in the novel, there's no way to calculate it, but Maria says "It's going to hit the Pacific Ocean, isn't it?" Meaning she was implying it would hit the ocean, then wipe out life on Earth. Scientist Jeff Magnum once compared such an event to a land mass collision, putting Giygas's base powers in likely the Continent levels of power. Although even before his transformation with the machine, he's described as being able to destroy the universe. (Or, the unverse, lol.) So even considering the comet feat we're likely severely low-balling him. So, clearly, Giygas takes strength in base. But let's consider their peak strength in other forms.

Giygas out of the Devil's Machine created a shockwave that affected the entire time axis and threw it into chaos, which exists over infinite timelines. And similarly, the God of Hyperdeath could match the powers of Chara, who could erase the entire world of Undertale and rebuild it. Both Mother and Undertale's verses have shown to contain multiple timelines, and whether the fact that Undertale has specifically infinite timelines is questionable, but it's all down to how you interpret it. There's really conflicting evidence for both sides of the timelines argument, but let's just say that there are infinite timelines in Undertale's lore for the sake of the debate. Then, Asriel would pretty easily take strength. Being able to erase an infinite multiverse is a lot more powerful then just being able to negatively effect an infinite multiverse overall. Without Undertale's infinite multiverse argument, Asriel doesn't measure up to Giygas's true stength. It's likely he wouldn't be able to comprehend it, also. To play it safe: Strength in base goes to Giygas, and strength at their peaks is a tie.

Moving on to durability, we'll analyze it the same way. In base, then at peak. Flowey again scales to his base strength at Large Building level, being able to tank hits from Knight Knight. Giygas doesn't have any direct feats of durability as his alien self, mostly due to the fact that Ninten & the rest can't even get close to harming him fully. Although Giygas definitely upscales from the Skyrunner explosion, putting him at around regular Building level, but that's not calculably higher than Flowey. So while Giygas could scale higher, Flowey takes durability in base.

Flowey at his peak doesn't have much in terms of feats for durability, but during the God of Hyperdeath fight, we clearly see his DEF being infinite. Given that Asriel is already an infinitely more powerful being than Omega Flowey, whose LV was 9999, he can be put in the Multiversal+ ranges of durability.  Comparing this to Giygas, out of the Devil's Machine, he could tank hits from the likes of Ness who fused his powers with the universe of Magicant. Scaling Giygas to Ness here, he reaches Universal levels of durability pretty naturally. It's very possible that Giygas upscales this, as even when Ness and his friends lowered Giygas's defense to the lowest it could be, he was still nowhere near being defeated. But, it's vague and we can't really fully grasp his durability at this level. Beyond that, though, the only way that Asriel was able to be defeated was by Frisk using ACT, and using SAVE to finally overpower him. Because of this it's unlikely that Asriel could even be harmed via conventional means from Giygas's final form. While both of them are likely similar in durability, Flowey can negate Giygas's just by attacking his SOUL, which is another reason I think Flowey takes this category. Flowey takes durability on both ends.

Finally with the stat trinity is speed. Flowey's highest speeds in base are scaling to the likes of Undyne, calculated at around Mach 3. This would also work for reaction speed, too. However there's just no measuring up to the speeds of Giygas's mothership, which could be brought from the ends of the universe to Earth in a matter of two years, reaching MFTL+ speeds. While we don't know how big Mother's universe is, it wouldn't even be possible by normal means to travel our entire universe in two years at light speeds. However, without his ship, he's still faster than base Flowey by scaling to the Mother 3 party who were able to dodge beams of light, putting Giygas at Relativistic at least. Giygas takes speed in base.

Speed at their peaks is a bit of a doozy. In the Hyperdeath form, Asriel was capable of keeping up with Frisk in the pacifist route, who could move and react to Asriel's Hyper Goner attack. Frisk is running through space-time in order to escape the destruction of it, which is pretty clearly Immeasurable. Giygas, when unsealed outside of the Devil's Machine, becomes his own dimension. This is pretty clearly deliberate, as Porky being the one who put Giygas into the machine would know the most about it, and likely wouldn't exaggerate in a scenario like this. Giygas, as an entity, becoming the entirety of a dimension, would mean he's everywhere inside of it no matter where you go, making him Nigh-Omnipresent. Since Asriel would have no way to take the location elsewhere, despite being able to move anywhere in the dimension, he would never be able to get the jump on Giygas and outspeed him. Giygas takes speed on both ends.

To recap:
Base strength - Giygas
Overall Strength - Tie

Base durability - Flowey

Overall Durability - Flowey

Base Speed - Giygas

Overall Speed - Giygas

Giygas takes 3 categories, and Flowey takes 2.

Giygas takes stats overall.

Equipment

Most of Flowey's equipment, besides the human SOULs, are pretty much just things that he creates on the spot. Sure they look cool, especially the Chaos Slicers, but they don't actually do much to play into his actual strength or abilities. Even the six human SOULs that turn him Omega revolt against him if the fight goes on for too long, so his one piece of equipment in his arsenal that really boosts his versatility is basically worthless after a while. Giygas on the other hand has a lot of things going for him in the item department. For starters, the Apple of Enlightenment gives knowledge on those who try to defeat him, and could theoretically know about Flowey ten years ahead of when they first meet. This can be debated, though, as the Apple of Enlightenment is unreliable at times as well. The Evil Mani Mani, though, is truly something that Flowey would have trouble working around. Due to the fact that it feeds upon the evil in one's mind, the statue would have a field day with the types of illusions it would create for Flowey, who is pure evil and doesn't have a soul to love with. Since Ness and Jeff thought they were in a completely different dimension when in contact with the Evil Mani Mani, it would give Giygas the opening he'd need to attack Flowey. The last notable thing I'd like to mention with Giygas's arsenal is the Ultimate Reset Button. Specifically:

Is the Ultimate Reset Button greater than Flowey's SAVE / LOAD mechanic?

Assuming that Giygas only has the ability to hold one load point at a time, since he never uses this ability in canon, then no, it isn't greater. Not only has Flowey shown to load multiple saves at once, but he uses it in a way that can kill Frisk multiple times over. Again, Giegue never actually uses this ability so it's very easy to say Flowey has greater control over timelines just, in general. Also we need to remember, the Ultimate Reset Button is specifically referred to as a "machine" or a "device." Meaning, it isn't biological like Flowey's, and can therefore be broken. Everything works in favor of Flowey here, but it's important to remember that if Giygas has his own saving and loading technology then he can likely remember when certain points are loaded and remember things from them, even if he didn't load them himself. This could only be debated in his Giegue form though, as his two other forms are shown to exist outside of time and space, therefore are acausal beings, and aren't effected by time manipulation like saving and loading. In conclusion, Flowey has greater control of loading points in time, but it can't be used to get much of an upper hand in the long run.

Giygas takes equipment.

Powers & Abilities

This is really where this matchup starts to get tricky. The only ability that the two share is acausality, which is befitting of two threats to the concept of time itself. Things like Giygas's forcefield wouldn't work against Flowey, as attacks in Undertale directly target the soul, negating conventional durability. This would've been hard to get around otherwise, as Giygas's shield quite literally reflects anything shot at it. Also, it's unlikely Giygas's corruption would work against any form of Flowey. But all for difference reasons, funnily enough. Flowey resists empathic manipulation since he doesn't have a SOUL to feel things with (which is different from the Evil Mani Mani, who specifically tricks others into using it and makes illusions based off of their mind) Omega Flowey's human SOULs might not actually turn against him if they're corrupted by Giygas, since they would now not feel the need to help others. Asriel also wouldn't be affected because he's someone who's good at heart, and therefore doesn't have evil in his soul to manipulate. I just think it's kind of hilarious that Giygas's main ability of getting the edge over others wouldn't affect any version of Flowey, even Asriel. Speaking of Asriel, his Hyper Goner attack is his most powerful ability (canonically speaking), being able to erase an entire timeline. Giygas wouldn't be effected by this because he exists outside of space and time, and his dimension is likely a place where things like that don't apply. Even if a timeline he's in is erased, he could just move to another one of which we know there are an infinite amount of. We know that Giygas wouldn't be effected by SAVE / LOAD (as discussed in equipment) so that's a moot point as well. Also, it's unlikely that Flowey would be able to counter his incorporeality completely. Erasing concepts and ideas is surely a thing that no version of Flowey can do, even if you can erase infinite upon infinite amounts of timelines, the only way that Giygas was defeated permanently was by millions of people praying for their safety against him. After he's out of the Devil's Machine, he becomes the concept of what it means to be evil, and it makes sense that the only thing that stops evil for good is people literally hoping for your defeat. Asriel is one guy, and doesn't have control of the thousands of SOULs trapped within his body to wish Giygas away for good. This isn't even mentioning the completely overwhelming versatility Giygas would have in his PSI abilities. Abilities to heal, mess with someone's mind, channel the elements, make you and your friends stronger, the list goes on. That would definitely give base Flowey a run for his petals. Flowey's powers and abilities may be cool as hell, but not enough of them are able to counter what Giygas brings to the table.

Giygas takes powers and abilities.

Experience & Skill

This one's difficult to quantify. Flowey, before Frisk came around, had been resetting the timeline for years. He quite literally got bored of an entire world of possibilities and just let time move on. Throughout that time he fought and killed everyone, befriended them, read every book, read every line of dialogue from them, and started seeing the world one dimensionally. As NPCs in a game. While Giygas on the other hand is an incredibly intelligent and important member of his species. He's created robots and technology that far surpasses anything humans are capable of. He's sent planets across the universe to their knees and likely has fighting experience because of that, while Flowey's skill and experience is limited to the underground. So, ez dub for Giygas right? Well, there's one more thing. Like for the entire blog we've heavily been looking at different forms, and when Giygas is out of the Devil's Machine, his mind breaks. He literally cannot think or perceive anything that's happening to him, being unable to process any action or thought on his own. It's the only way that he could've been able to combat Ness. But that being said, Flowey in his other forms would automatically be smarter.

 Giygas takes experience and skill in the beginning,
 and Flowey takes it near the end of the fight.

Support

So, support obviously goes to Giygas here due to Flowey not having any, but I'd like to note down the advantages Giygas's army gives him, and how Flowey can match it in some ways, at least near the start. Giygas's enemies that can cause ailments like night-time stuffiness and diamondization likely wouldn't affect Flowey due to his plant physiology. Moves like Shield could be negated with Flowey's SOUL manipulation, and this non-physical interaction allows him to attack Belch's ghosts as well, with their cold abilities not affecting Flowey either because of his cold resistance from staying in Snowdin. Same with his heat resistance. Minions with PSI Fire would do little damage against someone with really big heat sustaining powers. PK Beam γ could result in the end of Flowey early on, but if he summons the six SOULs to turn himself into his Omega form, he can negate insta-kill moves like that very easily. Although with how much teleporting and freezing support options Giygas has, it's likely he can kill Flowey with his army before he even has time to react. Although non-metallic members of his forces could possibly get absorbed by Flowey, also. Like he did with turning into his Hyperdeath form, when overwhelmed by a certain amount of opponents, he could easily absorb them and turn into Asriel. That is if aliens even have SOULs to be absorbed. There's a lot to consider here, but in general Giygas has a lot of options with his army in this fight.

Advantages and Disadvantages

Flowey

"Just go be with the people who love you."

Advantages:

• Calculably more durable in all forms
• Smarter if Giygas is out of the Devil's Machine...
• Not affected by Giygas's corruption in any ways
• Able to negate the machine's forcefield by attacking the SOUL
• Could absorb the non-metallic members of Giygas's army
• Greater time manipulation

Equal:

• Peak strength
• Final forms only beatable with compassion
• Banger soundtrack

Disadvantages:

• Human SOULs could potentially backfire if Giygas's corruption stops
• ...Less intelligent most of the time
• Could get overwhelmed by Giygas's army in the beginning
• Slower in all forms
• Can't load saves or erase the timeline to gain the upper hand
• Not able to grasp the true form of Giygas's attacks
• No defense against the Evil Mani Mani's illusions
• Story of Undertale
  
  

Giygas

"...wE aRe oF diFfereNt sPeCies, aNd yeT, We beCaMe friEnds..."

Advantages:

• Much stronger in base
• Smarter with more experience...
• More versatile equipment
• Faster in all forms
• Greater range of powers and abilities
• His army would give him a lot of options in the beginning
• Could possibly know about Flowey years in advance with the Apple of Enlightenment
• Unaffected by SAVE / LOAD & Hyper Goner

Equal:

• Peak strength
• Final forms only beatable with compassion
• Banger soundtrack

Disadvantages:

• Calculably less durable in all forms
• ...Intelligence wouldn't matter when out of the Devil's Machine
• Corruption wouldn't work on any form of Flowey
• Corrupting the human SOULs would make them less likely to turn against Flowey
• Worse time manipulation
• "C'mon, Reggie give us Mother 3!"
  
  

  Final Thoughts
  

Going into this I for sure thought Flowey was going to stomp. Originally I wanted to do this for how under researched Giygas was and well... He sure was under researched. Especially with things like the novel and manga, too, I had no idea about the infinite timeline stuff with EarthBound, or the god damn Ultimate Reset Button. Both of them in their final forms essentially can't be fully defeated, as Asriel was brought down by Frisk's love, and Giygas was brought down by humanity's love, so neither can really win with just power alone. Overall there's definitely a few ways Flowey can succeed, but Giygas pulls through more often then not, and even has ways to end the battle at the very beginning.

While some were surely rooting for him, Flowey was alienated from his own victory by the mother of all that isn't holy. As the last petal fell, Flowey got planted... Six feet under every reality.

The winner is Giygas.

Oh and one more thing...

Before I get to the next time, I wanted to talk about some other matchups I like for Flowey and why they're cool. While Giygas is awesome and definitely my preferred in a backstory-sense, there are a few others that are great, too. As a Death Battle fan you get to a certain point where you just really love a character and want to see them on no matter what person they fight.

Flowey VS The Princess (Slay the Princess)

The most likely for Flowey since the cast, and I'm happy it is. Slay the Princess isn't exactly the type of media you'd expect to see on DB and the Princess kinda works perfectly around Flowey's SAVE and LOAD mechanics, if you consider the different endings in StP as actually different timelines, that is. It would make for such a unique and emotional fight that I really love the potential behind. I played StP rather recently and I fell in love with this matchup kinda on the spot. Very nice. I almost even considered this to be the blog for this time but I just wanted to talk about Giygas lol

Flowey VS Bill Cipher (Gravity Falls)

This matchup at first seems like some DB Fanon Wiki slop, but after looking into it it's actually pretty cool and a decent alt for both. They share a pretty similar story, of being genocidal maniacs who abandoned their previous homes, and are trapped in a certain place, wanting to break the barrier and turn into much more powerful forms. Bill making a deal with Frisk and then falling down into Mt. Ebott to fight Flowey just seems like such a cool setup, but I'm pretty sure Flowey gets stomped here, sadly. The rap battle is fire tho.

Flowey VS Dimentio (Super Paper Mario)

This used to be my preferred for Flowey, and it's still a very good matchup in my eyes. These are two are conniving RPG villains, revealed as the true antagonist the whole time, who want to bring about the end of the world via colored heart-shaped objects. I think Dimentio may have been an inspiration to Flowey (given SPM's similarities to Undertale) which is why this works so well. Dimentio is a really great and frankly underrated Mario villain I'd love to see on the series at some point, in one form or another. This matchup used to be relatively popular a few years back, I even knew about it before I was really in the DB community, like that's how popular it was. Kinda sad to see it lose steam the past few years, but oh well.

Flowey VS Snatcher (A Hat in Time)

Discovered this one rather recently, so I think it needs some more time to grow on me fully but this one totally works as a matchup. Both call the main character an idiot/fool, both steal their abilities, jealous of others who can manipulate time, wanting to do it for themselves. They were even both princes in their past lives. Basically this matchup could be them playing off meta aspects of one another and insulting each other at the same time and I kinda love that. Also it's the only one where Flowey stomps instead of his opponent so that's cool.

Next Time

Piranha Plant VS Chomper (Mario VS Plants vs. Zombies)

If anyone wants to help with this feel free to message me:
Discord: dashfish
Reddit: Dash_Diamond

Thanks so much for reading!

Sources:

Giygas render used in the thumbnail

Flowey Respect Thread

Giygas Respect Thread

G1 DB Fan Blogs - Ness VS Frisk
Saul's VS Blog - Horror Sans VS Starved Eggman