Ultimate Gymosis is a fusion alien that appears on Earth-68. He first appears in John Smith 10: Final Fantasy. He is the fusion of Gymosis alongside several other aliens.

Ultimate Gymosis
General Information
Species 1/6 Osmosian

5/6 Varying Species

Home World None
Body Humanoid
Powers and Abilities
Abilities Energy Absorption
Matter Absorption
Power Absorption
Enhanced Strength
Enhanced Durability
Various others
First Appearance The Mad Doctor

Ultimate Gymosis Mark 1

Ultimate Gymosis was first created by Dr. Animo in an alternate dimension, utilizing Gymosis' ability to absorb DNA. With a stabilizing machine, it is created, being a fusion of Gymosis with Water Hazard, Stinkfly, Heatblast, Armodrillo and AmpFibian. While not part of the initial fusion, Swampfire and Blaze Spear are absorbed into it as well.


Ultimate Gymosis is based off Ultimate Aggregor, with some similarities. His head is of AmpFibian's, his arms are from Armodrillo and his legs are from Water Hazard. The differences are he has no grill plate on his neck, his chest is from Heatblast, and he has Stinkfly's wings on his back.

Powers and Abilities

Ultimate Gymosis has enhanced strength and durability of Armodrillo, as well as being able to pumping his jackhammers to increase his powers. From the ports on his hands, he can shoot slime from Stinkfly, water from Water Hazard, and fire from Heatblast. Using Stinkfly's wings, he can fly. He can shoot lightning from his tentacles, from AmpFibian.

He still has Osmosian's ability to absorb energy and beings, as he absorbed Swampfire and Blaze Spear. This also increased the power of his fire abilities.

Dimension 777 (John Smith 10: Final Fantasy)

Summoned by Dr. Animo

Dimension 40 (Ya-Mi-Oh!)

Ultimate Gymosis Mark 2

The second Ultimate Gymosis to appear was created by Yami, wielder of the Dueltrix, which utilizes fusion aliens. The DNA of Gymosis in the system of the Dueltrix creates the standard fusions, but can be utilized on the Dueltrix to become part of the fusion. He uses this to create Ultimate Gymosis, his absolute last resort alien. He's made of Gymosis, Feedback, Clockwork, Pacifista, Atomix and Light Cream.


The head is Gymosis', though it fits to proportion to the rest of the body. He has Light Cream's bunny ears which have Feedback's plugs on them, as well as Clockwork's wench key on his head. His torso is Pacifista's, having a broad chest, wearing a black jacket, with a white crosshair on it and paws going around the bottom. In the crosshair on the jacket is a transparent piece of green circular glass on his chest, revealing gears inside of him, as well as the Dueltrix symbol. He has Atomix’s arms, with large cylinders on them near the wrists. The cylinder on his left arm is filled with electricity, while the right cylinder is filled with green energy with dark green bubble-like spheres. His lower body turns into Feedback’s lower body, having Feedback’s black legs, which are more muscular then before, and two gold battery bolts on his hips. He has Feedback’s tail, but the tip has a bunny tail instead of an plug.

Powers and Abilities

Ultimate Gymosis has all the standard abilities of Gymosis, being enhanced strength, durability, as well as absorption powers.

From Feedback, he gains energy absorption from the plugs on his bunny ears, as well as elasticity of the ears. His left hand fires electric blasts.

From Clockwork, he gains Chronokinesis, able to control time, speed himself up through it, and fire time rays from the glass on his chest.

From Pacifista, he gains even stronger durability, as well as the ability to fire lasers, beams of pure light, from his mouth.

From Atomix, he gains the ability to fire atomic blasts from his right hand. He also gets increased strength due to it being used for his hands. He also has Atomix's tendency to name his attacks.

  • Nuclear Fusion: A combination attack of his right and left hand, fusing nuclear energy with electricity for an attack.
  • Fusion Cuisine: Him creating a fusion ball, the light from it being incredibly powerful. He can absorb the Fusion Cuisine with his ear plugs, causing his ears to be filled with light energy.
  • Polymerization: A fusion off all the powers. After using the ears to wrap around and disable his target, it fires a nuclear blast, electric blast, time blast and a laser all together, the combined power more than any opponent can withstand.

From Light Cream, he gains the ability of flight, as well has enhanced jumping. His jumps create shockwaves, and can use his ears to control his flight path by turning them.

Dimension 40 (Ya-Mi-Oh!)

Ultimate Gymosis Mark 3

The third Ultimate Gymosis was created by Yami, designed to destroy Diagon. It is the fusion of Gymosis with Gravattack, Astrodactyl, Ball Weevil, Granodite and Will-o-Wisp.


His main body is Gravattack’s body without a face, housing the core. Astrodactyl’s jetpack and wings are on his back. Four little insect legs from Ball Weevil come out underneath the body, forming like legs. Granodite’s head is on top of the Gravattack body, resembling a snowman. Granodite’s head has Gymosis’ horns. He has Will-o-Wisp’s flimsy arms, elongated to scale, and has Will-o-Wisp’s tail behind him. 

Powers and Abilities

Mark 3 isn't designed for regular combat. Its designated purpose is to destroy a target from the inside.

Four out of five of the added aliens added to it have the ability to fly, giving Mark 3 the ability as well.

Using Will-o-Wisp's powers, he can phase into a being and stay within their body. There, its battle tactic begins. It releases propulsion waves, which are made of mana from Will-o-Wisp and Granodite. Upon making contact with the walls of the inside of the body, some of the mana is reflected back to Mark 3, while the rest of it solidifies into Ball Weevil's explosive plasma. The reflected mana hits Mark 3, which absorbs the mana to build up energy in its core. Upon reaching a critical mass, Mark 3 will explode, creating a chain reaction that explodes the plasma as well, destroying the target from the inside out.

He can use the propulsion wave to create a gravity field, able to suck in targets and have them orbit him.

Dimension 40 (Ya-Mi-Oh!)

Ultimate Gymosis Mark 4

The fourth Ultimate Gymosis was created to fight Yliaster, made to be stronger than the other forms. It is the fusion of Gymosis along with Diagoneir, Upgrade, Chromastone, Shadow Lance and Darkside.


Mark 4 has Diagoneir’s body shape along with his wings, with Shadow Lance’s head spikes on his upper back. His arms are both muscular like Darkside’s, as his left arm is made of darkness from Darkside, while his right arm is made of Upgrade’s body, both of them with gloves on them. The chest is made of Chromastone’s purple crystal, with magenta stones peeking out of it. He has Diagoneir’s legs with Shadow Lance’s hover shoes. He has Darkside’s shadow head in the shape of Gymosis’ head.

Powers and Abilities

Mark 4 has the ability to fly, due to so many flight aliens.

It has Gymosis' standard abilities of energy drainage, enhanced strength and durability.

Its arms are elastic from both Upgrade and Darkside. The Upgrade arm can merge with technology and control it. The Darkside arm releases darkness in its attacks.

From Shadow Lance, Mark 4 has the ability to teleport with chaos mana, as well as attack with it. His hover shoes give him enhanced speed in flying.

From Chromastone, Mark 4 can absorb energy attacks, as well as firing ultraviolet energy waves.

Dimension 40 (Ya-Mi-Oh!)


  • This is the fifth fusion alien in the Earth-68 franchise.
  • Despite having the name "Ultimate", it is still a fusion alien.
  • Ultimate Gymosis Mark 1 has only two different aliens than Ultimate Aggregor, Heatblast and Stinkfly appearing instead of NRG and Terraspin.
  • This is the first fusion alien on Earth-68 to use a fanon alien.
  • The Ultimate Gymosis Mark 1 picture was created by User:FlameStrike96.
  • Similar to Kevin having multiple variations of mutations, Ultimate Gymosis has been revealed to be able to have multiple different forms.
  • Yami, the user of fusions, can access any of the different versions.
  • Mark 4 having Darkside as one of the fusion aliens makes it a member of the Darkside series.
John Smith 10: Final Fantasy
Main Characters
John Smith | Kai | Vector | Ian | Chopper | Gwen | Sakura | Logan | Kevin
Super John | Goop | Lodestar | Diamondhead | Eatle | Wildmutt | Alien X | Shocksquatch | ChamAlien | Humungousaur | Ditto | Ghostfreak | Pacifista | Chaos Reign | Wolf Bane | Echo Echo | Ripjaws | Upgrade | Sludge Blob | Malem | Davy Jones | Cannonbolt | Nanomech | Big Chill | Four Arms | Desert Storm | Buzzshock | XLR8 | Heatblast | Goat Foo | Terraspin | Cloudnine | Swampfire | Rath | Rumble Knuckles | Armodrillo | Articguana | Chromastone | Granodite | Will-o-Wisp | Clockwork | Jury Rigg | Grey Matter | Diagoneir | Gravattack | Xylofreeze | Light Cream | Eye Guy | Sonic Boom | Jetray | Spidermonkey | Blaze Spear | Wildvine | Shadow Lance | Way Big | Battle Tails | AmpFibian |Water Hazard | Stinkfly | Gymosis | Ball Weevil | Crashhopper | Mummy Dusk | Big Shot | Grey Meteor | Upchuck | Quilscade | Fasttrack | Spitter | Vicktor Stein | Kickin Hawk | Astrodactyl | Espionage | Slapstrike | Bloxx | Feedback | Toepick | Royal NiGHTS
Fusion Aliens
Echojaws | Stink Hazard | Articdrillo | Heatdrillo | Ultimate Gymosis
Ultimate Forms
Ultimate Ditto | Ultimate NRG | Ultimate Big Chill | Ultimate Shocksquatch | Ultimate Echo Echo | Ultimate Humungousaur | Ultimate Xylofreeze | Ultimate Ripjaws | Ultimate Clockwork | Ultimate Chromastone | Ultimate Wildmutt | Ultimate Grey Matter
Disc 1 Episodes
Beginning | Hunting | Stranded (JSXFF) | The Goblins | Break Out | End of the Show | Avalanche (John Smith 10) | Hunters of Artemis (episode) | Break In | Change In Command | Midgar Zolom | Travel (JSXFF) | Blessing of Artemis | Mythril Mines | Old Friends | Junon | Ghost of the Past | Gold Saucer | Through Grains of Sand | Chocobo Races | Doom Buggy | Junkyard | For the Children | Cosmo Canyon | Rocket Town | Curse of Artemis | To the High Seas | Forgotten Capital
Disc 2 Episodes
North Crater | Weapon | Blizzard (JSXFF) | Escape From Junon | Escape From Null Void | Escape From Midgar | Codon Stream (JSXFF) | The Huge Materia | Old Rivals | Battle of the Mountain | Lifestream | Temple of Artemis | Illusions | Change in Plans | We All Live in a Submarine | The Big Scare | Beast (JSXFF) | Friends (JSXFF) | Liftoff | Growth and Decay | Zombie Night | Healing (JSXFF) | Sister Ray | Invasion of Midgar | Invading Shinra | The Mad Doctor | Ultimate Power (JSXFF) | Monster (JSXFF)
Disc 3 Episodes
Into the Hole | Through the Tunnels | Down, Down, Down | On the Hunt (JSXFF) | Phantom's Wrath Part 1 | Phantom's Wrath Part 2 | Phantom's Wrath Part 3 | The End (JSXFF)
Omnitrix (Prototype) | Warmatrix
Dioga beta
Major Characters
Yami | White Dragon | Leo | Luna | Ishizu | Crow | Aster Phoenix | Skurd
Secondary Characters
Pegasus | Police (Detective Trudge, Axel, Sergent Mina, Commissioner Viper, Kaz) | Joey | Mahad | Axel | Mokuba | New Enforcers (Jack Atlas, Jim Cook, Tyranno Hassleberry, Seeker) | Team 4 D's (Blair, Syrus Truesdale, Sherry LeBlanc, Zane Truesdale, Valon) | Asgard (Dragan, Halldor, Duke Devlin, Adrian Gecko, Sartorius, Sarina, Devack, Andre)
Arcadia Movement (Sayer, Aki, Espa Roba, Weevil, Rex, Mako, Bastion, Tania, Mai, Mindy, Bruno, Thunder, T-Bone, Leon, Chris, Dimitri)
Main Enemies
Zorc the Dark One | Diagon | Senator Izayoi | Doma (Dartz, Rafael, Camulla, Kalin) | Noah Kaiba | Marik (Dark Marik) | Yliaster (Jakob, Primo, Lester) | Broder | Meklord Emperors (Skiel, Wisel, Granal) | The D | Yubel | Earthbound Immortals (Ccapac Apu, Aslla Piscu, Uru, Cissu, Wiraqocha Rasca, Chacu Challhua, Ccarayhua)) | Rex Goodwin
Secondary Enemies
Gozaburo Kaiba | Big Five (Gansley, Crump, Johnson, Nezbitt, Leichter) | Officer Trudge | Dr. Roman | Dr. Zigzag | Esoterica | PaniK | Enforcers | Odion | Nightshroud | Shadow Riders | Princeton Brothers (Chazz, Jagger, Slade) | D's Gang (Hunter Pace, Syd Barlow, Trapper, Greiger, Lawton, Nicholas, Hans, Hermann) | Asgard Criminals (Misty, Mad Dog, Mr. Shroud, Titan)
Yami's Aliens
Snare-ye-oh | 8tle | Swampmutt | Ghost Gadget | Rath Arms | Crashocker | Echojaws | Articdrillo | Lode-Stache | Buzzhead | Toemech | The Jetworst | Gold Chuck | Heatfreeze | Ultimate Gymosis | Malem Dust | Armoback | Humungoopsaur | Clockgrade | Dark Portal | Sonic Wisp | Heatdrillo | Dark Rath | Big Jones | Ditto Grade | Atomic-X | UpRigg | ClouAlien | Ghost Dust | Way Back | Nanohopper | Chill Rath | Amp-Eye | Stink Hazard | Spider Trout | Portadrillo | Wildrot | Worst Foo | Davy Back | Ssslumungousssaur | Chromatails | Diagonbolt | Elaskiblast | Gravadactyl | Dark Feed | Goop Chill | Terrafoo | Jury Shock | Franken Grade | Battle Rigg | Diamond Matter | Grey Rath | Clockwork Angel | Grafista | Will-o-Ditto | Toepire | Buzz Cream | Ghosttrack | Dark Stone | Hawk Charge | Dittoneir | Grand Goat | Big Chuck | Fourmungousaur | Rust Angel | Astro Dust | Desert Skull | Big Diagon | Dark Spider | Diamond Angel | Terragrade | Big Arm | Blox'n Lode | Chill Skull | Shock'Em
Nemetrix Aliens
Terroranchula | Magnutops | Chomper Ram | Slamworm | Basilisk | Thunder Log | Crabdozer | TKV | Hypnotick | Fell Wygic | Vicetopus | Seismic Constrictor | Buglizard | Mucilator | Iron Emperor | Muck Rock | Seer Digger | Diomedes | Tyrannopede | Panuncian
Dueltrix | Nemetrix
Dioga beta
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