In Challenge Mode, Peach and Bowser have different animations when unlocking/selecting them. Here are two videos showing the animations off: Peach: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-da2cpC1ffK4.html Bowser: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Bi-545iA82E.html
Sega happens to reuse/replicate/remake some of the character models from this game for their M&S at the Olympic Games titles (Bejing 2008, Vancouver 2010 and London 2012). As a 3D model editor and artist, I can tell. Heck, I have Yoshi's, Mario's, Luigi's, Bowser’s, Wario's and Waluigi's models ripped from the London and Winter Mario and Sonic games and I can happily confirm they are the same models (Yoshi's has added eyelids for him being sad rather than the bored expression most games use, as well as being happy). Superstar Baseball, in regards to Yoshi, has his nostrils textured rather than fully modeled
