Reflect the crown with Magic Cape. Play keep away until you can start a 0% combo or grab. Land hits when convenient, don't allow K. Rool to establish setplay with projectile strings.
smash 4 him (down throw -> up tilt) it works up till 30%ish. after that its 50/50 weather they will AD or not so either try to read it, go for up smash if ladders wont kill yet, or go for a ladder
i think King K Rool is better but you can try to juke them out because he is really heavy
Due to the heavy nature of K. Rool, Mario has a major advantage since of speed, less lag, and combo potential.
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Deflect blunderbuss projectiles with cape and start a grab combo
Combos, combos, combos! Combo-stuff him because he's heavy and has trouble escaping them.
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