Demon hidden vehicle
Press [Up], [Down], [L1], [L2],
[Select], [Start] at the select game screen (main menu).
A sound effect will confirm correct code entry. The hidden vehicle
will be available in all game modes.
All arenas and tracks
Press [Down], [Up], [R2], [R1],
[Start], [Select] at the select game screen (main menu).
A sound effect will confirm correct code entry. All the arenas
and tracks will be unlocked in time trial and battle mode games.