Here are some cheats and tips for the game Aryton Senna Kart Duel 2.
Bonus track:
Enter SENNA 1 as a name to access the “Extra Classic” track.
Bonus karts:
Finish in first place on the “Extra Classic” track to access the first bonus
kart. Use that kart to win two consecutive rounds under championship mode to
access a second bonus kart.