Red belt:
Press A, Down(2), B(3), C, Left, Right at the title screen.
Green belt:
Press A(2), Down, C, B, A, Up(2), Down at the title screen.
Red belt:
Press A, Down(2), B(3), C, Left, Right at the title screen.
Green belt:
Press A(2), Down, C, B, A, Up(2), Down at the title screen.