Jungle Book – Mowgli’s Wild Adventure – Gameboy Color

Jungle Book - Mowgli's Wild Adventure - Platform: Gameboy Color

Cheat mode
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Press Select to pause game play, then choose the "Music/Effects" 
option. Play the following sounds in the indicated order to enable 
cheat mode: 40, 30, 20,19, 18, 17, 16, 15. 

Level select
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Enter BMHG as a password to unlock all levels, including the 
bonus level, at the world map.