Upchuck

Upchuck is the Codon Stream's DNA sample of a Gourmand from the planet Peptos XI.

Appearance
Upchuck has green sin, six sprout-like growths on the back of his head, dark-green patch of skin on his head, light-green skin on his face, neck and belly and crooked teeth. He also has a light-green tail.

In the original series, Upchuck wears a black open-front suit with white over-sleeves and white bands around his legs and white padding under his three-toed feet and wears the Omnitrix symbol on his left hand.

In Alien Force and on, Upchuck just wears the Omnitrix and Ultimatrix symbol on his stomach.

Abilities
Upchuck has four strong, adhesive tongues that can stretch to great lengths, allowing Upchuck to latch onto large objects and reel them in with relative ease. Upchuck's mouth and stomach can also stretch, allowing him to swallow and digest objects fairly larger than himself. Upchuck possesses several acid-filled stomachs that dissolve almost all forms of matter. The items ingested are converted into explosive balls of liquids that can be expelled with great accuracy. He can also make them curve, like a boomerang, shuriken or frisbee. He can also use the energy as an acid. Upchuck seems to be able to take a surprising amount of punishment for a creature of its size, taking the force of a moving car impact as well as surviving after being thrown through a wall. In Duped, it is shown that he can spit out slime.

In the season 4 finale episode, Upchuck was able to grab the sub-energy from Driscoll, the Forever King and swing him around. The sub-energy gave Upchuck super speed. Afterward Upchuck dispersed it by firing the rest of the sub-energy into the sky from Mount Rushmore, vaporizing the remaining three faces (the fourth one was destroyed in an earlier altercation with Vilgax).

Weaknesses
Upchuck has a limit to how many big objects it can swallow at once. He is also slow when he eats a lot of things and becomes excessively fat. Otherwise, he is somewhat quick, considering his small size, but due to his body structure his speed is limited.

Ben 10, Alien Force and Ultimate Alien

 * Ben first transformed into Upchuck during the episode The Visitor, when Xylene unlocks him. Upchuck defeated Vilgax's Drone.
 * In Ben 4 Good Buddy, Upchuck chased after the Road Crew.
 * In Ben 10 vs. the Negative 10 (Part 2), Upchuck defeated the Red Knight and Driscoll using the Sub-Energy's speed.
 * In Ben 10: Secret of the Omnitrix, Upchuck battled Myaxx, thinking she was Vilgax.
 * Upchuck returned in War of the Worlds: Part 1, where he battled an army of DNAliens.
 * In Vengeance of Vilgax, Upchuck battled the escaped Chromastone.
 * In In Charm's Way, Upchuck defeated a giant Mr. Smoothy sign that came to life due to Charmcaster.
 * Upchuck returned in Ben 10: Ultimate Alien in Duped, Upchuck battled Urian.
 * In The Purge, Upchuck battled some Forever Knights.

Appearances
Ben 10
 * The Visitor (first appearence)
 * Ben 10: Secret of The Omnitrix
 * Ben 4 Good Buddy
 * Ben 10 vs. the Negative 10 (Part 2)

Ben 10: Alien Force
 * War of the Worlds: Part 1 (first re-appearence)
 * Vengeance of Vilgax: Part 2 (selected alien was Humungousaur)
 * In Charm's Way

Ben 10: Ultimate Alien
 * Duped (first re-appearence)
 * The Purge (selected alien was Lodestar)

Video games
Ben 10: Protector of Earth

Upchuck is only used for a special attack on the DS with a cheat to unlock Upchuck.

Ben 10 Alien Force: Vilgax Attacks

Upchuck is on the DS to replace Alien X. It's better with Upchuck to grab incoming attacks and spitting at the enemy.

Trivia

 * Upchuck is the first alien to be unlocked by someone other than Ben.
 * Upchuck's appearance varies with age, as shown in War of the Worlds: Part 1, as he looks more camouflaged and has narrower eyes compared to his younger counterpart in the original series.
 * Upchuck went through 13 or 14 design changes in order to become the way he was in the original series.
 * Upchuck is one of the five aliens to appear in all three series. The other four are Cannonbolt, Way Big, Ghostfreak, and Diamondhead.
 * Some of Upchuck's initial prototypes were later used to create Spitter, Articguana, Sploot and Mot Snikrep.
 * Upchuck is the second original alien to reappear in the series to not have the original voice actor, the first being Cannonbolt.
 * Not counting the non-canon episodes and the movies, Upchuck is the last alien used in the original series.
 * Upchuck has so far been only in DS games.
 * Upchuck's name is a pun of the verb upchuck which means to barf which is a reference to his ability.
 * It has been confirmed that Upchuck still has his 4 green tongues from the original series, but in the Ben 10 Ultimate Alien intro and War of The Worlds, you can see that he has a more human like tongue and also in the epispde The Purge.
 * All of Upchuck's appearances in Alien Force and Ultimate Alien (not counting T he Purge), were at night.
 * Upchuck has one similarity with Chromastone: both can absorb shots and send them back at shooter.