Goop (Earth-1010)

Goop is the Omnitrix's DNA sample of a Polymorph from Viscosia in Earth-1010.

Ben Prime as Goop
Goop is a humanoid pile of slime that can take any shape at will. In his default state, he has a nose-like beak and an amoeba-like shape.

Goop wears an Anti-Gravity Projector above his head, resembling a white UFO disk. It helps him retain his shape and projects his voice, as if Goop was speaking through a static-filled radio.

The Omnitrix symbol is on top of Goop's Anti-Gravity Projector.

Ben 23 as Muck-A-Muck
Muck-A-Muck is almost identical to Goop Prime, but his slime is colored various shades of blue and his Anti-Gravity Projector is gold.

Powers and Abilities
Goop can change his size and shape at will, assuming various forms.

Goop can project slime, either by spitting it or shooting a slime trail from his hands.

Goop possesses powerful digestive acids, with great offensive potential. He can render his slime acidic, which is able to dissolve most conventional materials.

Goop is extremely durable and virtually indestructible. Physical attacks have little effect and energy attacks will harmlessly phase through him. In the event he is injured, he can regenerate himself.

Equipment
In order to properly function on Earth, Goop wears an Anti-Gravity Projector. It gives him the ability to fly and greatly enhances his strength and shapeshifting capabilities.

Goop can throw his Anti-Gravity Projector akin to a flying disk, the edges being razor sharp.

Weaknesses
On a planet with heavier gravity than Viscosia's, Goop is completely dependent on his Anti-Gravity Projector for even the simplest forms of motion. If he is separated more than two feet from it or it is turned off, he will become an immobile pile of slime.

Death of Ben 10
In Chapter 8, Ben 23 transforms into Muck-A-Muck to melt the metal casing covering Mad Ben's Power Watch.

Ben 23

 * Chapter 8