Bust-a-Move and Bust-a-Move 2 are two dancing games for the Playstation. We know them as "Bust-a-Groove" here in America. Playing it, you can choose characters and compete against others, ala a fighting game. It may not have any 2D animation in it, but the characters certainly dress like anime characters (namely, their clothes are outrageously flashy), so consequently it makes for popular cosplay theme. ^_^

bunny.jpg	Here's a character who wears a bunny outfit (and presumably roller blades) from Bust-a-Move 2.  I'm not sure of the name because I haven't played the second game yet. ^^;
kitty-n1.jpg	This girl cosplayed a character from the first Bust-a-Move game called Kitty-N.  Take a wild guess what her costume looks like. ^_~
kitty-n-duo.jpg	With competitive games like Bust-a-Move, often you can choose characters. You know when two players use the same character, it changes the color of their clothing? Well, these two sisters, identical twins in real life, made the most of that by making matching black and white Kitty-N costumes!  Pretty impressive.