Teenage Mutant Ninja Turtles Tournament Fighters

Press L, R, L, R, L, R, A on controller two at the title screen. Select Vs. battle mode game and choose characters. The Metro Train and Studio 6 Stage will now be available on the stage selection screen.

Press Select at the character selection screen.

Enable the "Extra high speed mode" code. Then press X, Up, Y, Left, B, Down, A, Right, X, Up on controller two at the title screen. A female voice will confirm correct code entry. Choose Vs. mode and move to the left of Shredder to select Rat King or Karai.

Press Up, Left, Down, Right, X, Y, B, A, X, Y, B, A, X on controller two at the title screen. The lower green bar for special moves will appear, just as in tournament mode.

While you are facing an opponent you cannot defeat, use his dive bomb attack (Jump, Down + A). You should be able to defeat even Karai with this technique if you are fast enough.