Goop

Goop is the Omnitrix's DNA sample of a Polymorph from the planet Viscosia.

Ben as Goop
Goop is a humanoid pile of goo that can take any shape at will.

Goop has an Anti-Gravity Projector that allows him to be mobile in Earth's gravity and also projects his voice.

In Alien Force and Ultimate Alien, Goop wears the Omnitrix/Ultimatrix symbol on his chest.

In Omniverse, Goop has a nose-like beak and he has an amoeba-like shape. His Anti-Gravity Projector has been redesigned, and the Omnitrix symbol is on the top of it. When Goop speaks now, a crackle of static is heard at the end of each line as if he is speaking through a walkie-talkie.

Albedo as Negative Goop
In The Ultimate Heist, Negative Goop looks just like Ben's Goop in Omniverse, but is red and his Anti-Gravity Projector is white on the top with a red light on the bottom. Like regular Goop, the Ultimatrix symbol is on the Anti-Gravity Projector.

Powers and Abilities
Goop can manipulate his slime with his Anti-Gravity Projector. Goop can also launch it at enemies to attack them, the edges being razor-sharp. The goo part of his body is indestructible, making it difficult to defeat Goop by attacking his body.

In the Vilgax Attacks game, Goop is capable of throwing blobs of goo and spraying acid from his hands, and could rotate his feet around like helicopter blades to damage enemies.

Goop is able to eject slime with acidic or sticky properties.

Goop's Anti-Gravity Projector allows him to shapeshift and take on any appearance, as well as granting Goop the ability to fly. If Goop loses his Anti-Gravity Projector, the Omnitrix/Ultimatrix can immediately generate a new one.

Goop is able to to dissolve a large variety of materials.

Weaknesses
Goop is limited to his Anti-Gravity Projector controlling his body. If it is separated from him by two feet more, or turned off, Goop's body goes completely inert until it recollects it.

Goop can be hurt by being spun really fast.

In Alien Force/Ultimate Alien, because of his slime body, Goop's Omnitrix/Ultimatrix symbol could be easily pulled off, reverting Goop to normal and removing the Omnitrix/Ultimatrix from the user as seen in Primus. But in Omniverse, the Omnitrix is on the Anti-Gravity Projector, which eliminates this weakness.

Ben

 * Goop first appeared in The Gauntlet,
 * Goop defeated a Techadon.
 * In Darkstar Rising,
 * Goop battled Magister Prior Gilhil.
 * In Good Copy, Bad Copy,
 * Goop battled Negative Humungousaur.
 * In Undercover,
 * Goop saved Cooper from some DNAliens.
 * In Birds of a Feather,
 * Goop helped Simian escape from some guards.
 * In Vengeance of Vilgax: Part 2,
 * Goop escaped from the Omnitrix and hid in the sewers. He battled Swampfire before getting reabsorbed.
 * In Fool's Gold,
 * Goop appeared to battle Mayor Coleman.
 * In Simple,
 * Goop was used to avoid getting hurt after being pushed off a cliff.
 * In Vreedle, Vreedle,
 * Goop battled the Vreedle Brothers.
 * In Singlehanded,
 * Diamondhead turns into Goop while Julie is using his hand as a weapon, disgusting her.
 * In In Charm's Way,
 * Goop battled Charmcaster's rock monsters.
 * In Primus,
 * Ben turned Vilgax into Goop and pulled the Omnitrix off his chest, removing the Omnitrix from Vilgax.
 * In Above and Beyond,
 * Goop defeated Pierce.

Albedo

 * In Good Copy, Bad Copy,
 * Negative Goop was roaming around a computer store.

Ultimate Alien

 * Goop returned to Ultimate Alien in Andreas’ Fault,
 * Goop escaped a dungeon cell.
 * In Hero Time,
 * Goop saved Julie from falling.
 * In Deep,
 * Goop failed to escape some fans until Gwen saved him.
 * Goop used his Anti-Gravity Projector to save Piscciss. Although Goop was atomized and spread throughout Piscciss' sea, he was able to pull Piscciss back together.
 * In ...Nor Iron Bars a Cage,
 * Goop escaped a locked room and unlocked the door to let Gwen out.
 * In Viktor: The Spoils,
 * Goop appeared as King Xarion was looking through the Ultimatrix for AmpFibian.
 * In Revenge of the Swarm,
 * Goop battled the Victor Validus clones. As soon as Goop tried to catch them, they escaped.
 * In The Creature From Beyond,
 * Goop saved Gwen and Kevin.
 * In Ben 10,000 Returns,
 * Goop battled Eon's servants.
 * In Greetings from Techadon,
 * Goop battled the yellow Techadon robot.
 * In The Perfect Girlfriend,
 * Goop was defeated by Ssserpent.
 * In Catch a Falling Star,
 * Goop broke into Carl Nesmith and Jennifer Nocturne's motel room.
 * In Night of the Living Nightmare,
 * Goop battled Vilgax.
 * In The Beginning of the End,
 * Goop defeated the Forever Knights.

Ben

 * Goop returned to Omniverse in Blukic And Driba Go To Mr. Smoothy's,
 * Goop battled Trumbipulor.
 * In Ben Again,
 * Goop was used by 11 year old Ben (in 16 year old's body) to find a clue pipe in the sinks.
 * In A Fistful of Brains,
 * Goop was defeated by Ultimate Albedo.
 * In It's a Mad, Mad, Mad Ben World: Part 1
 * Goop failed to defeat Subdora and Exo-Skull, but unintentionally succeeded in creating a means to track them down.This was also goop's first speaking role in Omniverse.

Albedo

 * In The Ultimate Heist,
 * Negative Goop was used by Albedo to catch the Polymorphic Crystal.

Ben 10 Alien Force: (Video Game)
Goop is a playable alien character in the game (DS only).

Ben 10 Alien Force: Vilgax Attacks
Goop is a playable alien in the game.

Ben 10 Alien Force: The Rise of Hex
Goop is a playable alien in the game.

Appearances
{{Scroll box
 * content====Ben 10: Alien Force===
 * Vengeance of Vilgax: Part 2 (escaped and restored)

Ben

 * The Gauntlet (first appearance)
 * Darkstar Rising
 * Good Copy, Bad Copy
 * Undercover
 * Birds of a Feather
 * Fool's Gold
 * Simple
 * Vreedle, Vreedle
 * Singlehanded
 * In Charm's Way (accidental transformation, selected alien was Way Big)
 * Above and Beyond

Albedo

 * Good Copy, Bad Copy

Vilgax

 * Primus

Ben 10: Ultimate Alien

 * Andreas’ Fault (first re-appearance)
 * Hero Time
 * Deep (x2)
 * ...Nor Iron Bars a Cage
 * Viktor: The Spoils (cameo; unconscious)
 * Revenge of the Swarm
 * The Creature From Beyond
 * Ben 10,000 Returns (intended alien was Rath)
 * Greetings from Techadon
 * The Perfect Girlfriend
 * Catch a Falling Star (cameo)
 * Night of the Living Nightmare (dream)
 * The Beginning of the End

Ben

 * Blukic And Driba Go To Mr. Smoothy's (first re-appearance)
 * Ben Again (by 11-year old Ben)
 * A Fistful of Brains (cameo)
 * It's a Mad, Mad, Mad Ben World: Part 1 (accidental transformation).

Albedo

 * The Ultimate Heist

Video Games

 * Ben 10: Alien Force (Video Game) (DS only)
 * Ben 10 Alien Force: Vilgax Attacks}}

Trivia

 * According to Dwayne McDuffie, Goop is a single celled-organism.
 * According to himself, Goop believes his voice prevents others from taking him seriously.
 * Goop's Anti-Gravity Projector isn't part of Polymorph biology; Goop has one due to the difference of gravity between Viscosia and Earth.
 * Goop's Anti-Gravity Projector became a substitute for the missing Anti-Gravity Multiplier on planet Piscciss.