Well, I don't know how to replace the in-game NPC mascot files with a different mesh and textures. I know there's probably a tutorial for it at MTS2, and someday I'll learn, but I'm lazy...

There's some Social Bunny meshes at MTS, that could be used- ideally, different ones for male and female. The bunny needs to be that bright pink color shown on the pennant as well. This may be too much work, just let me know if it is! It would be nice to replace the cheerleader dress mesh as well, I've never liked it much since the skirt is much longer than any cheerleader I ever saw wear! Considering the very short length of most Maxis skirts, I really think it's even more ironic
