Extra saved game positions :
Select the New System Data option, then hold L1 + R1 + L2 + R2 + Select + Start and press Circle to increase the number of saved game positions to fifty.


Mirror tracks :
Finish in first place on all tracks. Then, press Right at the track selection screen.


Alternate footstep sound effect :
Pause game play and press L1, L1 , R1, R1 , Down, Up, Circle.


View ending sequence :
Complete all mirror tracks, then press Select at the title screen.


Double money :
Save the game twice in different slots. Enter the bank and use the money transfer function. Move the money from one slot to the other to double your money.


Bonus animals :
Purchase all five kangaroos and five dinosaurs. The blank kangaroo and white dinosaur will now be available.


Double Your Money :
Save your game in any memory block, then save your game in another block. Go to the bank and select money transfer. Transfer your money from one block to the others to double your money. Do that again to make you rich.


Hidden Animals :
To gain two hidden animals, buy all five kangaroos and all five dinosaurs. Once you've done so two new animals will appear, a black kangaroo and a white dinosaur.