Perk Upchuck has green skin, six sprout-like growths on the back of his head, a dark-green patch of skin on his head, light-green skin on his face and belly and crooked teeth. He also has a green tail.
In the original series, Perk Upchuck wore 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 Ultimate Alien, Murk Upchuck has swampy-green skin, tanned stomach and muzzles, black digits and black-green spots on his tail, limbs, hips on his back. His eyes are now sharper, look pupil-less and green. His teeth are now more aligned with visibly sharp canine teeth. He wore the Omnitrix/Ultimatrix symbol on his stomach.
Powers and AbilitiesEdit
Both Upchucks have four very strong, adhesive tongues that can stretch to great lengths, allowing them to latch onto large objects and reel them in with relative ease.
Both Upchucks' mouths can stretch, allowing them to swallow objects larger than themselves. They are connected with a trans space bladder dimension where he stores all the "food" he eats.
By breathing air out of their mouths, both Upchucks are able to fly.
The items ingested are converted into explosive balls of liquids that can be expelled with great accuracy. Perk Upchuck can also make them curve, like a boomerang, shuriken, or frisbee. Murk Upchuck hasn't shown this. Upchuck redirecting an energy beamAdded by Andreas smithersPerk Upchuck is 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 Murk Upchuck can spit out slime. Perk Upchuck hasn't displayed this.
Murk Upchuck can eat and spit out energy, such as lasers, in the same way he eats and spits out acid matter. Perk Upchuck hasn't displayed this.
In Heroes United, Murk Upchuck was capable of eating Alpha's containment ball, demonstrating to have very strong and durable tongues, as the ball weighed an immeasurable amount.
Both Upchucks have a limit to how many big objects they can swallow at once.
Both Upchucks are slow when they eat a lot of things and becomes excessively fat. Otherwise, they are somewhat quick, considering their small size.
If either Upchuck do not spit out something he eats, he will get very fat until he spits it out.
In Ben 4 Good Buddy, it's revealed that Perk Upchuck cannot consume food.