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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 villain. 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.