A stage selector hack for Did Dug II. Press start at the title screen and you will access it. Press up or down to switch between stages and A button to select a stage.
Rom: Dig Dug II (J) [b1]
CHR32: 4D2FE0FE
SHA1: 67DFA3BD7607A5E542E53C1A3253091B6C0FFF96
MD5: 78A618D72E27434955F5778E17B6279C