Till this day, noone has posted a single scan or scans of feats from the turtles. Not one. Until i see something that has me say "Woah! Maybe the turtles are as good as the high end street lvl'ers", they lose in every thread where they are up against one.
Sorry, but this forum is and has been based off shown proof. With that said, Bats wins.
Depending what's in his utility belt the Turtles should win.
If Bruce's standard equipment includes exploding batarangs, liquid-nitrogen capsules, electric-shock batarangs, foam pellets, etc. He might make it interesting.
But more often than not Turtles win. There are four of them. And there meybe just a class below him in skill, the only thing saving him is his equipment which again depends on what he's carrying.
batman would win but he would have to fight each one one at a time. no way he can take out all 4 at the same time. but the problem for bats is they are not just gonna stand there and watch there brother get there butt kicked there going to take some action of course. shredder might be able to solo batman
The Turtles has amazing levels of teamwork skills. No way is he taking them all out when fighting them at the same time. If this is the early versions of TMNT, they are ready to kill (Which can prove problematic for Batman). If this is the most recent versions of TMNT, they don't need to kill and each one can easily solo.