Jab combo: King K. Rool punches twice with his boxing gloves and then does a slash with his claws.
Ftilt: King K. Rool bounces his belly forward (might as well use the gold plate belly armor for something).
UTilt: King K. Rool jumps up, using his crown to attack.
DTilt: King K. Rool sweeps his claws at the opponents feet. When King K. Rool crouches, he does the fake "death" animation from DKC.
Dash Attack: King K. Rool uses his Blunderbuss to propel him forward (its shoots fire while he is holding it backwards).
NAir: K Rool spreads out and does a belly flop.
FAir: King K. Rool puts his head forward and snaps his jaws, biting multiple times.
BAir: King K. Rool turns around real quick and swipes in front of him.
UAir: Uses his crown to attack with a headbutt upwards (similar to his up tilt but he spins).
DAir: Pulls out a small klaptrap and points it downward. The klaptrap starts biting repeatedly
FSmash: King K. Rool causes a cannonball to fall right in front of him.
USmash: K Rool holds up his blunderbuss and fires a puff of gas above him.
DSmash: King K. Rool jumps up in the air and does a butt stomp (The Down B from my original post was just what most people use although I'd rather have him use the electricity pods from DKC3).