First off, let me tell you how I found it. In the Super Mario World cartoon, in the episode "Ghosts 'R Us", Mario, Luigi, Peach, and Yoshi are searching for Oogtar. While searching, they bump into a MagiKoopa. Peach says, "Watch out, that's the most powerful Koopa wizard in all of Dinosaur Land!" (Who would most obviously be Kamek)
You know who it was? Wizenheimer. Kamek Wizenheimer.