Tony Hawk's Pro Skater 2

Cheat Mode
Pause the game, then hold Numpad 7 and press Spacebar, Spacebar, Spacebar, C, 
V, Up, Down, Left, Up, C, V, Spacebar, V, B, Spacebar, V, B. 
The pause screen will shake if you entered the code correctly. 
Next, select the "End Run" option from the pause menu. All cheats,
FMV seqences, and skaters will be unlocked. 

Thin Skater
Pause gameplay, Hold "Numpad-7" and press: Spacebar, Spacebar, Spacebar, 
Spacebar, C, Spacebar, Spacebar, Spacebar, Spacebar, C, Spacebar, Spacebar, 
Spacebar, Spacebar, C. Keep repeating to make skater thinner. 

Neversoft Skaters
At the Main Menu, hold "Numpad-7" and press: Up, C, C, V, Right, Up, B, V.
Now create a skater with a Neversoft Dev Team name. 

Special Meter Always Full
Pause gameplay, hold "Numpad-7" and press: Spacebar, V, B, B, Up, Left, V, C. 

Raise Stats to 10
Pause gameplay, hold "Numpad-7" and press: Spacebar, V, B, C, V, Up, Down 

Turbo Mode
Pause gameplay, hold "Numpad-7" and press: Down, C, V, Right, Up, B, Down, C, 
V, Right, Up, B. 

Fat Skater
Pause gameplay, hold "Numpad-7" and press: Spacebar, Spacebar, Spacebar, 
Spacebar, Left, Spacebar, Spacebar, Spacebar, Spacebar, Left, Spacebar, 
Spacebar, Spacebar, Spacebar, Left. Keep repeating to make skater fatter. 

Blood Mode
Pause gameplay, hold "Numpad-7" and press: Right, Up, C, V.