If youre having trouble beating the monkey w/ the boomerang because of all those mutated deku babas, press start a couple of times to skip the scene where he cuts loose the first 2, and when you start, they shouldnt be there. run straight to the circle of pillars, and he will attack you with the 'rang instead of freeing the babas. he might bring down one, but its better than all four! stay in the circle, wait for him to throw the rang, and roll into the pillar he's on. when he falls use jump attacks.