Leonardo and the other turtles fought the Best as well. If you think about it, Leo is like the Ryu of the whole game because he has the same goal as him and fights like him!!!!!!!!
I think Mikey mostly fights like Ken. He does three Rising thunders just like Ken does three Shoryukens. Then he waits at times to do a Dragon breath attack just like Ken waits at times to do a Hadoken.