Axel was in tm2, 3, 4 (super axel), small brawl, head-on, black, and he was a pre order bonus vehicle for ps3 (so all the games except the first one). In all the series, his vehicle was one of the few one's that stayed the same, along with sweet tooth's. However, Axel's character backstory was actually more consistent, from game to game, than even sweet tooth's. Just a little background for ya :)