King Koopa's alter egos

King Koopa's alter egos are the many aliases utilized by King Koopa throughout numerous episodes of The Super Mario Bros. Super Show!. With a few exceptions, an alter ego involves both a special costume as well as a different name. Aside from cosmetically fitting the theme of a given episode, no real reason is given as to why King Koopa uses these alter egos, as they don't conceil his identity. It's possible that King Koopa just uses them for the the pleasure of it.

Kid Koopa
In "Butch Mario & the Luigi Kid", King Koopa kidnapped Princess Toadstool, and hid her in a mine in the Wild West. It was here that King Koopa donned a cowboy getup and dubbed himself Kid Koopa. The name was only ever mentioned onscreen one time, by Sheriff Mouser.

Kid Koopa demanded for Mouser to capture Mario, Luigi and Toad. Although he didn't capture them, Sheriff Mouser and a group of Snifits did lure the trio into a trap of Kid Koopa's, actually a sheriff's office disguised as an Italian restaurant. Posing as a chef, Kid Koopa locked Mario, Luigi and Toad in the jail cell and left them there.

Thanks to Toad, Mario's group managed to escape from the jail cell, and headed to the mine where Princess Toadstool was being held captive. Kid Koopa and his Koopa Troopas followed them there, where he challenged Mario to a quick-draw duel with handheld Piranha Plants. Mario dodged the fireball, used his Piranha Plant to distract the Koopa Pack, and ventured into the mine, where he and his friends found Princess Toadstool. However, they also accidentally fell down a mine shaft and Kid Koopa mocked them for their clumsiness. Mario and Luigi got out of the shaft by rerouting water from a nearby pipe, which also sent Kid Koopa and his Koopa Troopas flying out of the mine.