Everything Except Hidden Music
At the title screen, press up, up down, down, left, right left, right, B, A, B.
At the "Press Start" screen, press Up(2), Down
(2), Left, Right, Left, Right, B, A, B to unlock
Secret Music Track For Ramone's Style (Ramone Car)
UP, DOWN, UP, DOWN, A, B, X, Y
at the "Press Start" screen