It is the 2nd anniversary game in the series and as such shares more similarities to `Puyo Puyo! 15th Anniversary` than `Puyo Puyo 7`. This game came out 4 months before `Sonic Generations`, which is also commemorating the 20th anniversary of the Sonic games.
There are 24 playable characters available, each with their own 8-stage course (similar to Puyo Puyo! 15th Anniversary).
This game, as it's predecessor, was released only in Japan.