Stinkgoop

''"You really just had to pick the two grossest aliens." -'' Gwen Tennyson.

Ben 10,000 as Stinkgoop
Stinkgoop has Stinkfly's body shape but with goop's texture. The Biomnitrix symbol is located on the Anti-Gravity Projector.

Credit
The image of Stinkgoop was created by RZGmon200.