Kick a bike

[Chris2Balls [:B]]

TheShyGuy had a point. Your Hitmonchan has terrible form compared to Dudley, which explains why the jab looks off. The animating itself is really smooth, but the pose could be better. Hitmonchan can't pack a lot of strength in the punch as it is curently, it doesn't feel fully extended and it's a low blow. Not only that, but the back foot doesn't flex like that either irl. It's awkward to fight with one leg facing one way and the other another when you're boxing.

Here's an edit of two of your frames taking into account Dudley's frames:

Note the height of the arm and how it is roughly level with the eye. The chest goes from front to side, too. I haven't edited the other glove, but I'd say it goes up far too high: if you consider that in the first Dudley frame its top touches his chin, and in the second frame it's slightly above the level of his mouth, aswell as next to it.

Anyway hope it helps!