Retro

Retro was a scientist that was trying to use the rebuilt imaginatior to use his imagingtion to take over the world however his mind is too warped and only makes mutants he then uses kid power to make the thing work and it does very well however, calvin and the gang defeat him and ship him off of ankor with the help of Galaxoid and nublar he is currently in a high security prison under constant but plans to kill calvin and hobbes. Retro, along with Rupert Chill, is one of the few "serious" villains, as in he is not goofy and clumsy (i.e., Dr Brainstorm), and he is considered someone whom Calvin and Hobbes are actually afraid of. He is voiced by Ozzy Osbourne.