Teenage Mutant Ninja Turtles IV : Turtles in Time

Level select (Japan version only)

Highlight the "Option" selection at the title screen, then quickly press Up(2), Down(2), Left, Right, Left, Right, L, R on controller two.

Ten lives

Highlight the "Option" selection on the title screen. Quickly press Up(2), Down(2), Left, Right, Left, Right, B, A on controller two, then Start on controller one. The "Rest" option on the options screen may now be set to ten.

One player extra continues

Press Start on controller two just before losing with no continues remaining. Game play may be continued as player two with the continue total reset to full.

Special attack

Press B + Y to use a special attack. Note: You will lose health by doing this and it is not very powerful