Get Mystery Rider...
	Hidden Racers...
	Phil, Lil, Doug, Otto, and Sid...
	Ren and Donnie Thornberry...
	TJ Drum and JT Murd...
	Turbo Boost...

To get Mystery Rider beat all the tracks on easy mode then he will sometimes be choosable. P.S the Mystery Rider is Plankton from the T.V. show Spongebob Squarepants.

If you beat the game 3 times you can get 5 new racers. You can get Phli and Lil from the rugrats, Sid from Hey Arnold, Doug from Doug and Otto from Rocket Power.

Beat the game on ALL three difficulties.

Finish 2nd Cup.

Finish 3rd Cup.

At the beginning of a race, when it's on 3, hold down the up button on your keyboard and you should get a boost.