Pinky (Pinky and the Brain)

&nbsp Pinky is a abino mouse who is Brain's sidekick and the complete opposite of him, stupid and joyful

He is taller than Brain, has a overbite and a straighter tail.

He made his debut where he helps Brain, Lizbeth and the others defend the multiuniverse from Marceline;s Dad in the Great Time Travel Adventure. Pinky meet the heroes through Lizbeth who swore to help him and Brain get their lab back if they helped her and her friends against Marceline;s Dad