Ressha Gattai Diesel-Oh (烈車合体 ディーゼルオー, Ressha Gattai Dīzeruō) is the secondary Giant Robo of the ToQgers. Diesel-Oh is the combined form of three certain Support Ressha. While Diesel-Oh lacks any weapons, its raw power is more than enough to compensate. Its ranged move is the Diesel-Oh Impact (ディーゼルオーインパクト, Dīzeruō Inpakuto), where it slams its right fist down on the ground, forming an explosive trail to rush at the opponent. Its finishing move is the Diesel-Oh Spinning Kick...