Master of the martial art Tenku Chushin Ken (天空宙心拳 literally Sky Space Heart Fist). Using the Wolf Sword Kenro (剣狼), Rom can combine with Kenryu and Baikanfu for more power.
The original Rom Stol toy was a remold of Protteser from the DX Bunshin Gattai Gordian set (released as Godaikin "Gardian" in the USA).
Trivia
Most of the mid-episode entrances of Rom Stol are similar to the style of Sergio Leone Westerns in terms of the "overall feel" of the scene as well as the background music.