Not really, no, but I do gang up on someone should the opportunity arise, in which someone is in between another person and myself, and we basically read each other's minds. One of my friends, though, is basically a paranoid schizophrenic in Brawl and automatically assumes that everyone immediately targets him and gangs up on him if he so much as gets hit, or at least uses that as an excuse. I truly wish I had a video of this hilarity.
Actually, now that I think about it, I was away from the game to go get food once, and my friends changed the game to team battle and they both picked Metaknight against me as Ike, because they couldn't beat me, and when I come back they Mach Tornado spam me. Thankfully, Ike's got a counter, and they're no good with MK, so I still won.