The frequency of 2 on 2 MMA matches seem to be increasing as MMA's popularity grows, but I'm not so sure if it's a good idea. When one fighter is eliminated, it's just a beatdown of epic proportions when the lone remaining fighter has to face off against the other team. I've very rarely seen a 2 v 2 fight end up "fair."
The chaos is still pretty entertaining, though. And these fighters who sign up for the melee know what they're getting into, so all I can do is shrug my shoulders and enjoy the clips, like this one from Poland.
At least the ref is on top of things.
That was just a recent 2 v 2 MMA show. They've been going on for years now, and they're all equally wild:
This stuff is just crazy: