Enter the following codes in the Cheat menu

Level select:
XXX RATED CHEAT

Launch Pad 69 Level:
SHOWMETHEMONKEY

Rampage Skatepark Level:
IOWARULES

The Dam Level:
THATDAMLEVEL

Las Vegas Level:
SHOWMETHEMONEY

Roots Level:
UNDERGROUND

Sheep Hills Level:
BAABAA

Syracuse Level:
BOYBANDSSUCK


Play as Amish Boy:
ELECTRICITYBAD

Karma's Bikes:
KARMA311

La'tey's Bikes:
LATEY411

Manuel's Bikes:
MANUEL415

Mika's Bikes:
MIKA362436

Nutter's Bikes:
NUTTER290

All Bikes:
65 SWEET RIDES

Amish Boy's Bikes:
AMISHBOY1699

Hellkitty's Bikes:
HELLKITTY487

Itchi's Bikes:
ITCHI594

Joyride's Bikes:
JOYRIDE18

Rave's Bikes:
RAVE10

Skeeter's Bikes:
SKEETER666

Tripledub's Bikes:
TRIPLEDUB922

Twan's bikes:
TWAN18

Stage Select:
MASS HYSTERIA


Night Vision Mode:
3RD SOG

Happy Bunny Mode:
FLUFFYBUNNY

Ghost Control Mode:
GHOSTCONTROL

Super Crash Mode:
HEAVYPETTING

Green Skin Mode:
MAKEMEANGRY

Visible Gap Mode:
PARABOLIC


Park Editor:
BULLETPOINT

All FMV sequences:
CHAMPAGNE ROOM

Bonus Movie 1 FMV sequence:
THISISBMXX

Bonus Movie 2 FMV sequence:
KEEPITDIRTY

Dam 1 FMV sequence:
BOING

Final Movie FMV sequence:
DDUULRRLDRSQUARE

Launch Pad 69 1 FMV sequence:
IFLINGPOO

Launch Pad 69 2 FMV sequence:
PEACH

Rampage Skatepark 2 FMV sequence:
BURLESQUE

Syracuse 1 FMV sequence:
FUZZYKITTY

Syracuse 2 FMV sequence:
MICHAELHUNT

The Bronx, NYC 1 FMV sequence:
LAPDANCE

The Bronx, NYC 2 FMV sequence:
STRIPTEASE

Las Vegas 1 FMV sequence:
HIGHBEAMS

Las Vegas 2 FMV sequence:
TASSLE

UGP Roots Jam 2 FMV sequence:
BOOTYCALL

Sheep FMV sequence:
ONEDOLLAR

Sheep Hills 2 FMV sequence:
69

Enter the following at the Cheats menu

Unlock all Levels:
XXX_RATED_CHEAT

Unlock all Movies:
CHAMPAGNE_ROOM