Again, hoping this is the right forum!!
Having searched far and wide for a set of rules for playing with M.U.S.C.L.E figures, I finally stumbled upon an awesome RPG/Tabletop game called 'Superstar Pro Wrestling'
It seemed to have everything....except rules for creating your own wrestlers.
But then, after scanning through some of the forum posts on the same page, I spotted that someone had made a Windows-based PC Simulation of the same game, which is a little complicated to work with at first, but fully customisable; allowing you to edit the existing 80's and 90's real life wrestlers -names, stats, moves and set name- and even create new ones from scratch!
You can find the program here ---> https://sourceforge....ce=typ_redirect
I'm currently in the process of editing and adding as many of the M.U.S.C.L.E/Kinnikuman characters as I can find the details, and special moves of, as possible (Thank you wikipedia!!) before I hold my own personal Muscle League Matches and Tournaments
A little like Johnny once did on his own KinnikuMuscle Wrestling website, which if you have never checked out before, do, because it's frikken hilarious