8-Bit Soul board - Get nine Time Trial Coins with Ricky to unlock the 8-Bit Soul board.
Alternate boards - Get eighteen Time Trail Coins to unlock alternate designs for the regular boards.
Alternate costumes - Successfully complete the hard challenge to unlock the corresponding alternate costume for your current character:
Backbone board - Get nine Time Trial Coins with Tara to unlock the Backbone board.
Bad Cat board - Get nine Time Trial Coins with Akari to unlock the Bad Cat board.
Broken Forest board - Get five Time Trial Coins with Rob to unlock the Broken Forest board.
Cold Front board - Get five Time Trial Coins with Kemen to unlock the Cold Front board.
Conquest board - Get nine Time Trial Coins with Rob to unlock the Conquest board.
Crime Scene board - Get two Time Trial Coins with Tara to unlock the Crime Scene board.
DNA board - Get five Time Trial Coins with Tara to unlock the DNA board.
Expert Avalanche challenge - Enter "EATFIKRM" as a code to unlock the Expert Avalanche challenge.
Extreme Avalanche challenge - Enter "9AVVIKNY" as a code to unlock the Extreme Avalanche challenge.
GCN board - Get two Time Trial Coins with Rob to unlock the GCN board.
Ghost character - While playing the game, press C-stick Down once or twice and your player will turn translucent.
Happiness board - Get five Time Trial Coins with Akari to unlock the Happiness board.
Hard Avalanche challenge - Enter "2AUNIKFS" as a code to unlock the Hard Avalanche challenge.
Mind Invasion board - Get five Time Trial Coins with Ricky to unlock the Mind Invasion board.
Mr. Beake's board - Win two trophies in gate challenge mode by besting the high score on two courses to unlock the Mr. Beake's board.
NST 1080 Avalanche board - Win fifteen trophies in gate challenge mode by besting the high score on fifteen courses to unlock the NST 1080 Avalanche board.
Novice Avalanche challenge - Enter "JAS3IKRR" as a code to unlock the Novice Avalanche challenge.
Old School board - Win six trophies in gate challenge mode by besting the high score on six courses to unlock the Old School board.
Once Bitten board - Get two Time Trial Coins with Akari to unlock the Once Bitten board.
Power Painter board - Win nine trophies in gate challenge mode by besting the high score on nine courses to unlock the Power Painter board.
Pulse board - Get nine Time Trial Coins with Kemen to unlock the Pulse board.
Scaretactix board - Get two Time Trial Coins with Kemen to unlock the Scaretactix board.
Winterborn board - Get two Time Trial Coins with Ricky to unlock the Winterborn board.