Pop'n Music (InstanceTopic, 14)

From Compile Worlds

Pop'n Music is one of those games with cutesy graphics that award broken hands and badass music (Some of them sound familiar, as well) to anyone who dares play. It's not very well known, though. And because of a certain childhood experience with the game, one fan, who also happens to be somewhat of an idiot thought contrary, until just recently.

The ludicrously large cast of characters include transplants from other anime, series or games by the company that made the rythm game, a cute robot girl with a computer theme and a ballerina in black whose skin is even gray.