User blog comment:YaldaRobin/Dash Special Attacks - What do you think?/@comment-26261279-20141116152408

Wario: Use his Shoulder Bash from Wario Land.

Dedede: Perhaps a Hammer Spin similar to that of what the Ice Climbers had. He has done those in some of his battles.

Charizard: Aerial Ace, hovers a bit in the air, and uses his wings to slash opponents, launches them skyward, if it connects he lands behind them.

Diddy Kong: This one is going to sound very odd, but perhaps give him his guitar from Donkey Kong 64 and have him slide on the ground riffing it, while music shockwaves come out. If you've played Marvel vs Capcom 3 Dante has something similar.