Hidden Vehicle:

To access the hidden vehicle called the 
Demon, go to the select game screen 
(Main Menu) and press Up, Down, L1, L2, 
Select then Start (if the cheat code has
been entered correctly you will hear a 
sound effect). The hidden vehicle will 
be available in all game modes.


All Arena and Tracks:

To access all the Arenas and Tracks go 
to the select game screen (Main Menu) 
and press Down, Up, R2, R1, Start then 
Select (if the cheat code has been 
entered correctly you will hear a sound
effect). All the Arenas and Tracks will 
be available in Time Trial and Battle Mode
games. 


by unknown