Jigglypuff: Get a charge shot, don't use bombs to recover, try to catch her out of stuff with up-tilt, u-air, and the charge shot you should always be carrying or trying to get. Puff Samus really isn't that bad, try not to go for grabs super often unless you are really confident they will connect, you will get rested. Even then, grabs won't get a whole lot. If ol'Jiggls misses a rest, Samus has SUPER strong punishes on her. Up-tilt -> charge shot or d-air -> charge shot is a lot of percent, and has kill potential!
Marth: This match-up sucks. Try to zone with missiles rather than trying to hit him. Up-tilt and f-tilt are pretty good, as well as CC d-smash. Up-tilt can lead into other stuff as well as down smash, f-tilt can make Marth step back a little bit. CC as much as possible in this match-up, don't get knocked into the air, you won't come back down.
Falcon: This match-up isn't too bad either, just try not to get kneed. If Falcon grabs you, they will probably try to d-throw into knee out of habit, you can DI away and f-air to catch him out of this. Edgeguarding Falcon is super free especially with Samus, just cover the options with missiles and tilts. Placing a bomb above the ledge then letting it drop down so it hits Falcon if he goes for the ledge then up-tilting him is really good. If you get a grab on a stage where you can follow up on platforms, go for d-airs into whatever you want to do. Don't d-tilt or d-smash his shield, he can jump out of it and knee you.
