It showed two locked characters. One is apparently Mega Man, but who's the other?
One of the main reasons I love the game is the uniqueness of the second character:
*spoilers*
It's Vaporeon. Really bizarre moveset, but it works well.
*end spoilers*
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The Many Forms of Kobe:
http://i39.tinypic.com/oqx98z.jpg -- credit to KIRBEH