Goop

Goop is a Polymorph (a word meaning "many shapes") from the Planet Viscosia (a play on "viscous"). He is a shape-shifting, self-regenerating green blob that weighs 200 pounds. Goop's slime is controlled by a UFO-like machine over his head, which is also where Ben's voice comes from. The UFO can cause the slime to take any shape and even hover off the ground. However, if the UFO and the slime are separated by even a short distance, the slime will become inert until the UFO recollects it. Goop's slime can be made acidic, as seen in "Good Copy, Bad Copy". Goop first appears in "The Gauntlet" when Ben battles an alien robot.He can grab stuff with his body. He is realy hard to damage due to being goo. If the UFO becomes hitten Goop turns back to Ben.

WEAKNESS:Goop's weakness is revealed when who hit the small ufo that is how you would destoy goop!