Brain

Brain Plays Pooka in Heidistasia (CartoonNetworkandHasbroFan360 Style)
He is a dog.

Brain Plays Gruffle in Haru's Song (CartoonNetworkandHasbroFan360 Style)
He is a dog.

Brain Plays Wolfman in The Nightmare Before Christmas (CartoonNetworkandHasbroFan360 Toon Style)
He is a wolf.