Gear 戦士 電童/ Gear Senshi Dendoh

A combination of 2D sprite-base action game and a 3D polygonal versus fighting game. The main gameplay has you controlling a giant Gundam-like robot, crashing every enemy unit in your path. After beating a stage boss character, the game switches into a 3D one-on-one fighter game. This mix of styles really sets it apart as a unique game.