Battle Brawlers was a very shirt lived line of figures, okay there were only two, from Kenner in 1986. The pair were a sort of fantasy/kaiju Rock 'Em Sock 'Em Robots. Both figures, Crackarm and Hammertail, can throw punches or scorpion strikes at thei opponent attempting to hit the weak spot and disarm (or dis- tail) their opponent.
The figures have a very cool look to them and I can't help but think if more characters or some more posabilty were incorporated that the line could have been more successful. Either way it's a pretty interesting line that can be quite challenging to collect now so if you go hunting for them good luck!