Slammo

From Jenny Everywhere Wiki

In one dimension, Slammo was the leader of one of the four battalions the Master's genetically-engineered Drag-Racing Monkey, the “Rokkas”. He had sharp teeth, no visible ears, and wore a baseball cap.

Like the other Drag-Racing Monkeys, he was ultimately retro-evolved back into an ordinary chimpanzee using the Anti-Serum. (COMIC: Jenny Everywhere vs. the Drag-Racing Monkeys)