Rush 2: Extreme Racing USA cheats and cheat codes for Nintendo 64

Cheat menu
Hold C-Up + C-Down + C-Left + C-Right + L + R + Z at the setup menu.
After, highlight one of the following options on the cheat menu and
enter the indicated code. 
or
Highlight a cheat option and rapidly hit 
L + R + Z + C-Up + C-Down + C-Left + C-Right 
until you will able the cheats select.

Killer Rats
Hold L + R and hit Z, Z, Z, Z.

Invincibility
hit [L, C-Up, R] 2 times.

Invisible Car
Hold L + R, and hit [C-Up, C-Down] five times.

Invisible Tracks
Hold L + R and hit [C-Down, C-Up] 5 times.

Invisible Car
Hold L + R and hit [C-Up, C-Down] 5 times.

Massive Mass
Hold L + R and hit C-Up, C-Down, C-Left, C-Right.

Stunts
Hold C-Down, C-Left, C-Up, C-Right and hit A, R, Z, L, A, R, Z, L,
R, A, Z, L.

New York Cabs
Hit R, L, Z, C-Up, C-Down, C-Up.

Resurrect In Place
Hold Z + C-Left and hit C-Right. After, hold Z + C-Right and hit
C-Left. 

Frame Scale
Hold Z + C-Down and hit C-Up. After, hold Z + C-Up and hit C-Down.

Tire Scaling
Hold Z + C-Left and hit C-Right. After, hold Z + C-Right and hit
C-Left. 

Auto-Abort
Quickly hit C-Up, C-Up, C-Up, C-Up.

Game Timer
Hold Z + C-Down and hit C-Up. After, hold Z + C-Up and hit C-Down.

Fog Color
Hold Z and hit [C-Left, C-Up, C-Right, C-Down] 3 times.

Levitation
Hold L + R + Z and hit C-Up, C-Up, C-Up, C-Up.

Suicide Mode
Hold Z and hit [C-Down, C-Left, C-Up, C-Right] 2 times.

Super Tires
Hold L + R and hit [C-Up, C-Right, C-Down, C-Left] 2 times.

Super Speed
Hold L + R and hit C-Up, C-Down, C-Left, C-Right.

Track Orientation
Hold L + R and hit [C-Up, C-Right, C-Down, C-Left] 4 times.

Gravity
Hold L + R + Z and hit [C-Left, C-Up, C-Right, C-Down] 3 times.

Car Collisions
Hold L + R and hit [C-Left, C-Up, C-Right, C-Down] 3 times.

Cone Mines
Hold Z and hit [L + R] 4 times.

Car Mines
hit Z + C-Up, After hit [C-Right, C-Down, C-Left] 6 times.

Inside-out Car
Hold C-Right + C-Down and hit L, R, Z.

Damage
hit [R, C-Down, L] 2 times.

Brakes
Hold C-Up + C-Right and hit Z, Z, Z.

Super Tires
Hold L + R, and hit [C-Up, C-Right, C-Down, C-Left] 2 times.

Suicide Mode
Hold Z and hit [C-Down, C-Left, C-Up, C-Right] 2 times.

Do the Dew
Hit L + R + C-Down, L + R + C-Left, L + R +C-Up, [L + R + C-Right]
2 times, Z.

Unlock Extreme Mirror mode
Highlight the "Mirror" option, at the track selection screen. 
Then, hold C-Left + C-Right + C-Up + C-Down and hit Left or Right

Unlock Taxi: Find 3 keys on any level
Unlock Hot rod: Find 6 keys on any level
Unlock Formula 1 car: Find 9 keys on any level
Unlock Prototype car: Find 12 keys on any level
Unlock Mountain Dew dragster: Find all 4 Mountain Dew bottles on any level