Cheat mode:

Press R + Z at the opening screen. Then, enter one of the following codes. 

     All tracks
     Enter THEUNIVERSE. 

     All characters
     Enter HAPPYHEADS. 

     Iggy's girlfriend and no other characters
     Enter ENTAROADUN. 

     Turbo mode
     Enter 2TIMES. 

     Ice platforms
     Enter ICEPRINCESS. 

    Gooey platforms
     Enter GOOEYGOOGOO. 

    Icy and gooey platforms
     Enter GOOEYICEPRINCESS. 

     Level select
     Enter JUMPAROUND. Then, pause game play to access the level
	selection	option. 

     Mix and match mode
     Enter SWOPSHOP. 

     Random bombs
     Enter OHMY. Running into other balls or obstacles may cause bombs
	to appear randomly. 

     Full turbos
     Enter GOBABY. 

     Fat reckin' balls
     Enter TOOMUCHPIE. 

     Small balls
     Enter MICROBALLS.

     Non-stop roller ball
     Enter NONSTOP. 

     Enable Turok 2 graphic effect engine
     Enter 2ROKTOO. 

     Black and white mode
     Enter ROLFHARRIS. 

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Full boost:
Tap Jump while on a boost platform. 

Bonus characters:
Press Z, A, L, R at the player selection screen. The bonus characters
are normally unlocked by finishing each race in first place.