Dr. Koopenstein

Dr. Koopenstein is a Frankenstein alter ego of King Koopa in the Super Mario Bros. Super Show! episode "Koopenstein". He is just basically Koopa wearing a white lab coat building an evil Robot Troopa. He captured the Mario Bros. and scanned their brains. Fortunately and unfortunately, Dr. Koopenstein couldn't use their brains, as even their combined brain power still shows a rating of a dimwit. Koopenstein is then attacked by Toad, and after a tussle between Mario and Co. and Koopenstein and Mouser, Dr. Koopenstein is knocked into his brain scanner and struck by lightning, thus creating the Koopenstein Monster.
Category:King Koopa's alter egos