King Koopa's alter egos
From the Super Mario Wiki
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 in any way. It's possible that King Koopa just uses them for the pleasure of it.
[edit] Other Costumes
There were two episodes in which King Koopa donned a costume, yet did not employ the use of an alias. Interestingly enough, both of these episodes were set in a jungle. In "Jungle Fever", King Koopa dressed up as a jungle native with a nose ring and bone necklace. In "Mario of the Apes", he sported the clothes of a hunter.
