Wario Land II is where the series really came into its own. The original's gameplay was a hugely modified from Super Mario Land 2 to replace Mario's block-hitting and Goomba-stomping with enemy bashing, Ground Pounding, and crazy powers that help improve your regular bashing attack. This game may not have those power-ups, nor does it have any evidence of Mario Land 2, but it surely took all of the great original elements of the first Wario Land and made it 5 times better.