Puyo Puyo is an extremely popular puzzle game series in Japan that originated as spinoff of Madou Monogatari. By making a chain of 4 or more Puyo's, they explode and deliver garbage onto the opponent's screen.
This run of Super Puyo Puyo 2 produces combos strong enough to completely overwhelm the competition every time.
The previous entry in the series, Puyo Puyo, has been localized under other names such as Dr. Robotnik's Mean Bean Machine and Kirby's Avalanche with different themes, but the gameplay remains the same.