Teenage Mutant Ninja Turtles II: Back from the Sewers

Cheat mode

Quick press B, A, B, A, Up, Down, B, A, Left, Right, B, A, Start at the title screen for level select and ten lives in single player mode. For two player mode, quickly press B, A, B, A, Up, Down, B, A, Left, Right, B, A, Select, Start.