Brain (Igor)

Brain Plays Comet in Robyn's Song (DisneyandNickelodeon Style)
He is a deer.

Brain Plays Bartok in Heidistasia (CartoonNetworkandHasbroFan360 Style)
He is a bat.

Brain Plays Fetcher in Toontown Run and Toontown Run (CartoonNetworkandHasbroFan360 Style)
He is a mouse.