At the title screen, hold Select+Up and press B, B, A. The title screen's music and animation will stop to confirm correct entry, and the following button cheats will now be available: Press A the amount of times corresponding to the desired level number (e.g. four times for level four) to start at that level. Press B for invulnerability. Press B twice for infinite lives and all items. Note that the code does not work in the Japanese version.