“Because I'm an evil Koopa Wizard! I don't need a reason to be mean and nasty. It's my nature!”
Mario, Luigi, and Princess Toadstool first encounter Wizenheimer while searching the Enchanted Forest for Oogtar the Caveboy, who is missing. After bumping into Wizenheimer in the forest, the Koopa Wizard forces Mario, Luigi, and Toadstool into a nearby Warp Tube, threatening to blow the trio up with a Bob-omb if they didn't obey.
This Warp Tube led to Wizenheimer's Haunted House, the basement of which he shackled Mario, Luigi, and Princess Toadstool in.
Wizenheimer later captured Oogtar, who had attempted to break-into his Haunted House. Wizenheimer was later defeated when Yoshi, after facing his fears and venturing into Wizenheimer's Haunted House, eats the Koopa Wizard's wand.
After having his wand eaten, Wizenheimer was bonked on the head by the recently released Mario and fell unconscious into his basement.
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