Ultimate Goop is a large, viscous blob of purple to teal coloration. He is rotund, with two eyes atop a large central mass connected to small sub-eyes.
The Ultimatrix symbol is located on his forehead above his eyes.
- Amorphous Body- Ultimate Goop has a body composed of slime that lets him shape parts of it to how he sees fit.
- Matter Absorption- Ultimate Goop can absorb matter into his body and consume them to increase his mass overall.
- Density Shifting- Ultimate Goop is able to control his density to move around in higher gravity. This also lets him thicken his outer layer to hit targets harder or become more durable.
- Biomass Loss- If Ultimate Goop looses parts of his biomass, he cannot reattach it.
- Ultimate Goop's new abilities are based on The Blob from The Blob (1958) and Monkey D. Luffy from One Piece.