Rocket - Robot On Wheels - Platform: Nintendo64

All vehicles:
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Pause game play and press Up, Down, Z, R, Left, Up, Down, 
Left, Down(2). A sound will confirm correct code entry. 

Low friction:
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Pause game play and press Up, R(2), Left, Z(2), Down, Left, 
Up, Right. A sound will confirm correct code entry. 

Low gravity:
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Pause game play and press Z, R, Z, R, Down, R(2), Right(2), 
R. A sound will confirm correct code entry. 

Heavy Rocket:
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Pause game play and press Up, Right(2), R, Right, R, Z, R(2), 
Up. A sound will confirm correct code entry. 

Super speed:
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Pause game play and press Z, Right, Down, Up, Down, R, Up, 
Down, Left, Up. A sound will confirm correct code entry. 

Super jump:
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Pause game play and press Down, Up, Down, Z, Up(3), R, Up Z. 
A sound will confirm correct code entry. Combine this code 
with the "Low gravity" code for even higher jumps.