I've played Mario and Sonic at the London games 2012
Party mode was fun to different, but fun.
It was fun and a little funny at the same time when I played as Eggman or Robitnick in the 100m dash. The characters have there own special movies they use while running, how dose twirling help you when a race,(Eggman).
Waluigi just swims fasts while running
Wario: Waluigi, I need your assistants.
Waluigi: Don't worry I will just swim up there.
CRACK
Waluigi: somebody call an ambulance. I think I broke my entire body somehow.