[@Renny] Eh, all I have is a name and nothing else. So really, we're in the same boat. I at least have a concept in mind for the Mach Fist Master, a heavily customized SD Master Gundam (yes, the same one Sousuke tried to build at the beginning). The name of the game with that will be maximized speed and agility, and using that to inflict an almost nonstop string of punches and kicks. It'll have ONE powerful attack it can call on in an emergency, one where it puts all of its particle energy into a single Shining Finger esque punch. The punch is meant to be so strong it all but guarantees an instant knock out, but it also leaves the Mach Fist Master with no energy left afterward, so it either hits and Sousuke wins, or misses and he loses. So basically an outright Do-or-Die attack.

[@Crimson Lion] It could be one of Sousuke's previous schools. I established that he's transferred several times and as a result has been on several battle teams before meeting Nanashi. This could be one of the clubs he used to be a member of.