Double Dragon Cheats
Go to the character selection screen. Then highlight Billy for three seconds, move to Marian and wait three seconds, move to Chung Fu and wait three seconds, and move to Jimmy and wait three seconds. Now Shuko and Duke should be selectable.
|Gameshark Double Dragon Hacks|
|Infinite Time||8008D26A 003C|
|Infinite Max Power P1||8008D230 00EF|