Super Princess Peach - Platform: Nintendo DS

Endless Fever:
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To unlock endless fever, you must complete ALL of the levels in the 
game TWICE. Your Music History and Puzzles should be complete and you 
should have beaten all of the Mini-games (You don't need to find all 
of the enemies to get it). After you have the above completed, go to 
the shop. It will be the last item for you to buy, but it doesn't cost 
anything. Endless Fever prevents your emotion meter from ever draining. 
If you want to turn it off, you need to go the the menu and go to extras 
to turn it off. 

Dash Attack Kassa:
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To unlock this move, you have to beat the game once. It allows you to 
attack while Peach is Dashing (hence the name). Press 'B' or 'Y' to use 
this while moving.