Head on over to the UnMario Wikia. Be sure to register an account if you haven't already.

From Unmariowiki

The Evil Guy is an evil character who hates cupcakes. He first appeared in Super Mario's Cupcakes, where he was the main villian. he re-appears in Super Muffin-o Sunshine where he tried to steal the Chocolate Sprites to make a Cupcake destroying machine. He used to love cupcakes until he didn't make it to the bathroom once and blamed the cupcakes. He weighs over 5000 extra-chunky cupcakes.