• VW Beetle: $18,000
• Eclipse: $18,000
• Jeep: $30,000
• Camero: $55,000
• Viper: $96,000
• Hummer: $145,000
• Porshe: $185,000
• Ferrari: $240,000
• JP: $290,000
• Mclairen: $350,000

• The Weinermobile
• Nintendo Power Concept Car
• The N-Logo
• Taco
• Museum Artifact
• Circuit Cart with donkees

These are the regular cars and their prices:

Type    Cost
EC      18,000
YD      30,000
CA      55,000
HM      145,000
PO      185,000
FO      240,000
JS      290,000
MC      350,000

Imagine these options are numbered 0 to 3. Input the following sequence (by pressing the Z trigger) while positioning the menu cursor (via Control Stick) at the appropriate menu items. If you mess up you can enter a menu item and return to the main menu to reset.

• Alternate Credits: 2, 2, 0, 1
• Open All Cars: 3, 3, 1, 3, 2, 0, 0, 0, 1
• Open Normal Cars: 3, 0, 0, 1
• Open Bonus Car 1: 3, 1, 2, 0, 1, 1
• Open Bonus Car 2: 0, 3, 1, 2, 1, 0, 2, 3
• Open Bonus Car 3: 1, 1, 0, 3, 0, 1, 0, 3, 2, 1, 2
• Open Season 4: 1, 0, 0, 3, 2, 2, 0
• Open Season 5: 2, 0, 3, 1, 1, 2, 0, 1, 3, 0
• Open Season 6: 3, 2, 1, 0, 0, 3, 0, 1, 2, 0, 3, 2, 2

Every time you buy a new car, race one race with it then sell it and buy the worst car available. Now buy full upgrades for that car and start another race. As soon as this race begins press Start and chose EXIT to return to the main menu.

Start the championship game again and chose the best car available (it should be the one you have bought and sold). You now have full upgrades for this car and loads of spare cash -- probably enough to buy the next car.

This cheat works even better in multiplayer as only one player has to buy a car for all of the players to be able to select it.

NOTE: Make sure not to jump backwards because you may get sent back to the tunnel that is through the waterfall.