So, I'm new to the competitive crew and I'm not that happy with my current megaman ( Trouble with zooning on fast chars) Any tips on how to improove in both ways?
Predict their Approach.
If they Don't have good projectiles they'll be force to approach you.
If it's Ground Approach, Lemon them. This beats Rolling and most other ground options. Beware of cross up rolls, Megaman doesn't have fast enough options to punish these. Especially Cross-up Roll > jab, which is very powerful against megaman.
If it's Aerial, Simply Shield. Opponents can't grab while in the air. Punish attacks on shield with Utilt, Usmash, Grab
Beware of getting baited. Punish what you know you can get, otherwise Re-position yourself.
Again beware of Cross-ups, if you see a cross-up comin' Fox trot away. this is a good position.
If you can predict a an aerial approach you can immediately snuff it with a Fair, drift away, Metal Blade, reposition yourself.
While you're Zoning from a Distance, use Metal Blade and Leafshield. Leafshield when thrown has High priority and Metal Blade in hand has Strong knockback. When they Shield your projectiles you may instinctively Roll, fearing a Punish, but this could get ugly. If they are smart they will Shield it and See how you react to their new position. BE smart here. if you get scared by their new Position and their potentially follow ups, they may predict your defensive options and you get damage. If you've been playing defensive try throwing out offensive options that can regain you stage control, such as Dash attack or Grab, otherwise mix up your defensive options, Roll, spot dodge, Dash away, Jump, Drift away. Megaman's air speed is pretty good so you can get away with just drifting away from alot of characters.
Also if you just don't know, just use Rush. You can air camp by continuously bouncing on rush. Fast Fall > Airdodge > land on rush > Airdodge is very hard catch. Use b-reverse Metal Blade to Shift your momentum and be tricky and not get juggled. Depending on the MU this could be THE go to option, for example Lil Mac Can't Chase you into the air and its hard to catch megaman's landings when you Nair > Fast Fall or B-reverse Metal Blade, or Double jump, and Slow characters can't keep up with your Air speed.