Bust-A-Move DS - Platform: Nintendo DS

Play as the Evil Sorcerer:
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After you solved all 50 A puzzles, the game gave you the code to visit 
"Another World" and the evil sorcerer unlocked. 

In Puzzle Mode, Select 1-A, after 2-A, all the way to 5-A. After finish 
the last puzzle in 5-A, you'll get the cheatcode and the end credits. Then 
restart you DS and you'll be able to play as the Evil Sorcerer.

Sound test:
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At the main menu, press Select, A, B, Left, Right, A, Select, Right.

Unlock Dark World:
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When you finished all the A worlds in the light world with DEV enter the 
following cheat code at that title screen: A, Left, Right, A.