Clifford Adoptante: Enter the code COOLDUDE. Or, beat Clifford Adoptante in a race to unlock him as a playable character.

Mike Jones: Enter the code TOUGHGUY. Or, beat Mike Jones in a race to unlock him as a playable character.

Jessica Patterson: Enter the code BLONDIE. Or, beat Jessica Patterson in a race to unlock her as a playable character.

Greg Albertyn: Enter the code GIMEGREG. Or, beat Greg Albertyn in a race to unlock him as a playable character.

Cheat Codes: Enter the following codes to achieve that effect:
Effect: Code
Master code LOKSMITH
All characters POPULATE
All costumes YARDSALE
All tracks TRAKMEET
All bikes WHEELS
Bike always has flames from back FIRESALE
Low gravity FTAIL
Rider wears a helmet HELMET
No bike FLYSOLO
Slow motion effect WTCHKPRS
Freekout Time always active ALLFREEK
Burn It Up track CARVEROK
Gnome Sweet Gnome track CLIPPERS
Let It Ride track BLACKJAK
Rocket Garden track TODAMOON
Crash Pad FreeStyle track WIDEOPEN
Burbs FreeStyle track TUCKELLE
Brian Deegan's Dominator bike WHOZASKN
Brian Deegan's Heavy Metal bike HEDBANGR
Brian Deegan's Mulisha Man bike WHATEVER
Brian Deegan's Muscle Bound costume RIPPED
Brian Deegan's Commander costume SOLDIER
Clifford Adoptante's Gone Tiki bike SUPDUDE
Clifford Adoptante's Hang Loose bike STOKED
Clifford Adoptante's Island Spirit bike GOFLOBRO
Clifford Adoptante's Tiki costume WINGS
Clifford Adoptante's Tankin' It costume NOSLEEVE
Greg Albertyn's Champion bike NUMBER1
Greg Albertyn's National Pride bike PATRIOT
Greg Albertyn's The King bike ALLSHOOK
Greg Albertyn's Sharp Dresser costume ILOOKGUD
Greg Albertyn's Star Rider costume COMET
Jessica Patterson's Charged Up bike LIGHTNIN
Jessica Patterson's Racer Girl bike TONBOY
Jessica Patterson's Speedy bike HEKACOOL
Jessica Patterson's Warming Up costume LAYERS
Jessica Patterson's Hoodie Style costume NOT2GRLY
Leeann Tweeden's Hot Stuff bike OVENMITT
Leeann Tweeden's Seducer bike GOODLOOK
Leeann Tweeden's Trendsetter bike STYLIN
Leeann Tweeden's Fun Lovin' costume THNKPINK
Leeann Tweeden's Red Hot costume SPICY
Mike Jones' Beater bike KICKBUTT
Mike Jones' Flushed bike PLUNGER
Mike Jones' Lil' Demon bike HORNS
Mike Jones' Blue Collar costume BABYBLUE
Mike Jones' High Roller costume BOXCARS
Mike Metzger's Bloodshot bike EYEDROPS
Mike Metzger's Rhino Rage bike SEVENTWO
Mike Metzger's Rock Of Ages bike BRRRRRAP
Mike Metzger's Ecko MX costume HELLOOOO
Mike Metzger's All Tatted Up costume BODYART
Stefy Bau's 211 bike TWONEONE
Stefy Bau's Amore bike HEREIAM
Stefy Bau's Disco Tech bike SPARKLES
Stefy Bau's Playing Jax costume KIDSGAME
Stefy Bau's UFO Racer costume INVASION