This game has unused graphics.
A clone of Dance Dance Revolution, featuring a whopping one song that effectively loops forever. It's the exact song you think it is.
It's also on the Power Joy plug & plays.
Many, many Pikachus. Presumably he was intended to be one of the dancers in the bottom-right corner, but was later removed.
Hello Kitty, another unused dancer who probably didn't legally agree to be here.
Various leftover bits of Pikachu and Kitty that don't form a full sprite.