I'm going to break up my CC into bits so you'll understand it better.
All together:
~ Well for the most part, you need to work abit on reactions like this: Every time a person got hard his head and torso extend abit then pulls itself back together.
The green stick:
~ There is a constant wobble on his body throughout the whole anim which really sets the mood off. His right leg wobbles during his punches to the black stick on the left.
~ There was a shift in his arms when he did the downward move with his left leg which I think it looks like he is spazzing everywhere. There is some resizing on his arms that happen throughout the kicks.
~ On his 5th attack his right arm shifts downward and his left leg was too far bent that gave the appearance he broke his leg mid transition.
~ His head was too far back when the left black stick did the uppercut to his face which makes it seem like his head was about to fall off.
~ He wobbled just a bit when he got up from the attacks which can be fixed easily.
~ When he was in neon mode, his foot placement is off on his left leg because it slides over. He needs to keep his foot planted to insure he has a firm grip on the floor. Also in neon mode when he did his first attack, it didn't have any force because he lifted his foot down too early. I would suggest to make his legs go up just abit and then come downward.
~ His attacks were all abit stop and go which means you made the spacing way too close.
The black stick on the left:
~ I'm not really sure how his leg was broken but could still move accordingly. He needs to react like he feels the breaking of his bones like (Eg: Limping).
~ When the green stick grabbed his arm, his other arm needs more placement. It sidled over as he was pulled closer to the green stick.
~ I feel when he backs up for the punch, he doesn't have enough easing on him. Maybe you could add a double frame or two to fix that.
Black stick on the right:
~ When he starts walking towards the green stick, add a double frame right when he starts to move to symbolize he doesn't just starts out abruptly.
~ When he holds his gut, his head doesn't seemed to be connected to his body.
~ When you added DF to the part where he punches downward, you can see the wobble and his right arm resizes. Also on that same punch he wasn't eased out so he stopped abruptly.
Effects:
~ Only thing I would like to see is more easing in the particles.
That basically sums up my CC, you seem pretty good though keep animating. :3