Mat Hoffman's Pro BMX cheats and cheat codes for Dreamcast

Cheat codes:
Pause the gameplay and press the following button combinations:

Big Tires: Hold L and press Down, B, B, Down. 
Bonus Course Time: Hold L and press X, Up, B, A. 
Divide Trick Score by 10: Hold L, then press UP, DOWN, UP, B, B, X.
Enable Perfect Balance: Hold L, then press X, LEFT, UP RIGHT.
Jump higher: Hold L, then press UP, UP, UP, UP.
More Course time: Hold L then press X, Up, B, A. 
Multiply Trick Score by 10: Hold L, then press X, B, B, UP, DOWN, DOWN.
New Colors: Hold L then press Down, Down, Down, Down. 
Show Balance Status: Hold L and press Left, B, X, Y, X, B, A. 
Slow Down Time: Hold L, then press X, Y, B, A.
Special Always Available: Hold L and press Left, Down, Y, B, Up, Left, Y, X. 
Unlock Granny as playable: Hold L and press Up, X, A, A, Down, B. 

Get Burnside Level from Tony Hawk's Pro Skater Game
Use all characters to get 2 gold medals and all 30 covers

Get Warehouse Level from Tony Hawk's Pro Skater Game
Get a 200,000 point combo. Do not use any cheats.

Neversoft movie:
Play as Tony Hawk to get any medal on both competition levels

Grandma movie:
Play as Grandma to get any medal on both competition levels 

Unlock Granny:
Retry a level in Career Mode ten times.

Unlock Tony Hawk:
Use any character in carrer to get all 30 covers and 2 gold medals