Unlock the Good Stuff:

Enter “IGOTITALL” or “GIVEALL” as a name in career mode to unlock all characters,

boards, mountains, and options.

No Cheating:

Enter ICHEAT, IMSPECIAL, or NEWHILL at the name entry screen. The phrase

“Hey, no cheating” will be spoken to confirm correct code entry.

GameShark Codes

Unlock all boards       3006bf0c 00ff
 
Unlock all characters   8006c2fc ffff 
   
Always place first      800a6892 0000

Have all medals         8006be3c ffff
                        8006be3e ffff  

Thanks to Revolution readers Nick and Matthew Eaton!