Bonus characters:
Completion of each of the following will unlock a Bonus Character

• Street Work Mode: Get an "A" rank on each level and track
• Street Work Mode: Get an "S" rank on each level and track
• Time Attack Mode: Complete each level and track in within the time limit.
• Coin Mode: Earn a "Perfect" rank on each level and track

Bonus boards:
After all four new characters have been unlocked, press Up, Up, Down, Down ,Left, Right, Left, Right, B, A at the board selection screen. These four bonus boards will now be available:

• Ika-Chu (Double jumps)
• Father (Longer air time)
• J-B (Press A + B for turbo jump)
• J-Arm: (Extra turbos)