Doc seems to be the inventive genius of the Squeaks. He pilots a flying saucer, and he also appears in two boss stages. In Cushy Cloud, he is seen piloting a mechanical version of Kracko, and in Jam Jungle, he controls Yadogaine, a giant, mechanical hermit crab. Doc doesn't seem to have any physical powers, as he only attacks with machines.
Doc is a small bluish-white mouse bearing major resemblance to his underlings, suggesting that he might be a highly-intelligent Squeaker. He has large round ears and a large green mustache which takes up the majority of his face. He often pilots a red flying saucer, which can drop bombs. He also outfitted the saucer with a laser shooter and an ice cannon.