I seem to have trouble with regular Samus. It's basically the only time I have to change up my play style and be much less aggressive. My friend is rather good at Samus so he always just rolls and spams neutral B.
Rolls can be punished with a chasing Fair if they roll away and a Nair if they roll towards you. I'll say that I have trouble vs people rolling only to charge their neutral b but that just means they are giving you free percents if they only roll. Its the ones that charge between their offense or defend themselves while charging that gets difficult.
Samus has every projectile that she (
jiggs) wants (
doesn't have). So we are forced to approach to do anything. Only playing defensive when they feel they can push an offensive up-close.
We can duck semi-charged shots and super missles. Normal missles don't go far but will track you so crouching doesn't work and our SH stuff gets blocked out. Her Zair(i'm gonna consider it a projectile even though I think it isn't) I believe can be crouched just don't crouch vs her grab instead(can someone check if samus' grab can get us while crouched, its been abit...). While I haven't seen many samus' using zair as an aerial offensive tool it has good reach and can stop our spacing.
Outside of projectiles most of samus' attacks are
very precise. It's best to assume they know how to space and land their hits so our job is too make it as difficult as possible, by weaving in and out, for them to connect a good smash.
Unfortunately I haven't played enough samus' to talk 'bout her close game. either way they can and will go for scratch damage before getting close to get a kill.
Interesting note: I'm not sure if its her down smash or down tilt(or if im thinking of someone else) but the move where samus sweep her leg across the ground is not only laggy but her hurtbox is extended still after the sweep, so run up rest is very easy here.
Sorry if this is too general, I haven't studied samus' gameplan much
Edit: oh yeah, you can stay in the air(as in at least 1 full hop height) to avoid everything samus has but you can't do much from up there that the samus can't react to.