Puyo Puyo Fever (InstanceTopic, 17)

From Compile Worlds

Puyo Puyo Fever was SEGA's biggest and latest attempt to spread Puyo internationally. It was the first game to not use Madou Monogatari characters, making the game very controversial as a large number of players disliked the new characters. Arle and Carbuncle were kept in, though, the latter being an unlockable. However, the game did introduce a lot of new concepts, such as combo wait, Fever mode, dropsets and most importantly online play.

It also introduced Rider and her headboobs.