Waluigi, one of Nintendo’s most meme-able characters, did not make his first “WAH” until 2000, when Nintendo was developing Mario Tennis for the N64 and needed an extra character for Doubles matches. Someone suggested making a Wario equivalent for Luigi and giving him a pun name based on the Japanese word “igiwalui” (loosely translates to “a bad person”). Miyamoto had no involvement beyond final approval, so if he didn’t like it, the world might have never seen Waluigi, but he fortunately loved the concept.
The team then asked if they could develop “evil” versions of Peach and Daisy, and Miyamoto just laughed and said “I don’t even want to know what their girlfriends would look like!” That ended that, but it didn’t stop the fanbase from years and years of sketching out what a Wapeach or a Wadaisy would have looked like.
But as of today, we have a real answer. Turns out artist Fumihide Aoki, who was working on Mario Power Tennis for Gamecube in 2004, proposed Wapeach again, and this time he had mock-ups for the presentation. Again the proposal was turned down, but he saved his sketches and released them on the Internet today. BEHOLD WAPEACH:
Yeah, I know. Compared to the troll-like appearances of Wario and Waluigi, Wapeach seems kind of toned down. In fact it just looks like the regular Peach in a Halloween costume. But she did get far enough in development for a game model to exist:
Her colors are purple and yellow, like Wario. In our opinion Wapeach needed a bit more work. The sketch where she has an axe instead of a racket is one promising direction they could have pursued. Would Bowser kidnap Wapeach, or would she kidnap him instead? The answers to such questions will be told only in fanfics.