ALL cheats have to be done in options menu.
Get Halloween Bart:
Hold in the L and R buttons and press B,B,X,A.
Get Smithers in Mr. Burn's car:
Hold L and R buttons and press B,B,Y,Y.
Get Thanksgiving Marge:Hold L and R and press B,B,X,X.
Get Nuclear Bus:
Hold L and R and press B,B,Y,A.
Get Krusty's New Years Car:
Hold L and R and press B,B,X,Y.
Get Night-time Mode:
Hold L and R and press A,A,A,A.
Get 2D Mode:
Hold L and R and press X,X,X,X.
Get Little red car:
Hold L and R and press B,B,Y,X.
Get Slow motion Mode:
Hold L and R and press A,X,B,Y.
Get action camera mode:
Hold L and R and press X,X,X,Y.
I haven't got the cheat to type in for 'Christmas Apu', but you can still get him by changing the date on your gamecube to the 25th of december. He should appear in the character menu.
If you need more help, we've got more The Simpsons Road Rage cheats and also check out all of the answers for this game
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