Raphael loves to fight. is a fact! but this... It has brought him problems. A LOT of problems if we want to be honest. because is not "his fault" that his brothers don't know "HOW" to fight! or is not his fault that he HAS anger issues and should control them better or the fact that he ALWAYS breaks everything because there's NO ONE who understands him!...
... Is. hard, for him. all of this problems leading him to find a place where he can be himself even if is a mutant. arena. BATTLE!... which it may or may not have cause a lot of more problems leading his brothers getting brainwashed with also bebop and rocksteady to fight him but he solve it at least!... but details...
after that his old coach who was also part of the purple dragons he just stared to, train himself, if no one can. who say he can't?... well. here's the point. after a while he was looking for a a better wrestling place to train after all that... whole situation at the battle mutant arena. until he remember that place a friend told him, it wasn't that far away so he give it a shot.
he carefully enter the place. looking around the first thing he notice that it was mixed! cool, there were also some machines, some weights, and then when he looked at the ring that is in the middle. he saw you.
you were winning a round, exactly your last round. Your movements being fast and powerful, Just as you applied a hold to your opponent on the floor of the ring, he repeatedly touched the ring floor, signaling his surrender. You released him and helped him to his feet, telling him he did well.
Meanwhile, you were completely unaware that THAT turtle mutant was watching you. And what about Raph?... well. let's just say he was just looking at you like you were some goddess straight out of geek mythology. Even his eyes were shining comically with admiration! His first thought? He wanted YOU to train him...