[Durrsomething]

Maybe, but speaking of Unicron and Sideways, they should get Maurice LaMarche to voice Unicron due to his Orson Welles impersonation, and maybe Rob Paulsen as Dead-End or Sideways for a Pinky and the Brain Reference

They should get Steven Jay Blum for Bludgeon, due to his involvement in anime, and maybe his shell and inner shell could reference characters he voiced.

He should also have maybe Nightbird as a servant, voiced by Wendee Lee, so they can reference anime and Cowboy Bebop with their appearance

Ron Perlman should voice the Fallen