Mega Man's Counter Picks

Z dropping is crucial for this character you should definitely practice z dropping the metal blade into aerials because you can confirm kills off of them (ex: turnaround z drop into b-air)

Crash Bomber explodes instantly on Luma

Condition the ground/short hop movement with pellets. Then start protecting against full hops/double jumps with Flame Sword and Tornado Blow.

mind games start when you connect a metal blade, pay attention to how they react after getting hit with a metal blade and punish bad habits

Leaf shield can be used to deal with light projectiles, such as Link's (it even detonates the bomb), Cloud's normal special, and others