Mad scientist

The Mad Scientist of Robot Island was a similar human mad scientist like the Mad Doctor on Keep Away Island. However, the mad scientist instead created Robots and had a hatred for mutants.

He eventually even tried to invade Keep Away island with his army of robotic soldiers. In return, the Keep Away island Doctor made two super soldiers to defeat the invading robots : Fuzzy and Octocat.

The Mad scientist's robots were no match for the two mutants, and his invasion of Keep Away Island failed. He is never heard from again.

He was only seen in a flashback of Sgt. Snuggums.