TheMario360 (Playable character) (?)

[E-Man]

I don't know about the motion blur, but I don't think a punch like that would do a whole lot of damage. Even if it's a weak punch, you should have the character's spine move forward to prevent the character from looking stiff. It's part of a drawing/animation technique called the line of action that has been used since the day of cartoons from the 1930's and way before that.