Complete the following to open up bonus characters:
Earn an "A" rank on each level and track in "Street
Work" mode.
Earn a "S" rank on each level and track in "Street
Work" mode.
Complete each level and track in "Time Attack" mode
within the time limit.
Earn a "Perfect" rank on each level and track in "Coin"
mode.
Bonus boards:
Unlock all four bonus characters. Then at the board selection
screen, press Up, Up, Down, Down, Left, Right, Left, Right,
B, A. This will open up the Ika-Chu, Father, J-B, and J-Arm
boards.
