Different costumes:
Choose any character at the character select and instead of pressing A to choose, use other buttons like X or Y.
(supplied by: klock)
Play as Ein:
First, beat story mode with all 16 original characters, regardless of the difficulty.
Then, score in the top 3 as Hayate in the Survival Mode. Then, enter "EIN" as a name.
(supplied by: big-guy)
Easy Special:
When you get close to your opponent press Y, Y, Y, B. You will do a special without pushing all those buttons.
(supplied by: tyler)
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