Secret Rider:

To access the secret rider Granny, you must beat the Novice, Semi-pro, and Professional seasons in 1st place.

Higher speed:

During play, press L1 + Right, R1 + Down, Square, L1 + Triangle, R1 + Down, L1 + Left, Select.

Television camera:

During play, press Circle, L1 + Triangle, L1 + X, Triangle, R1 + Up to access the extra view.

Freestyle Area:

After you beat the Novice Season, a really cool Freestyle area will be available. Go there and try to get the golden coin for 100,000 points. It's hard.