Samus Pros vs. Rosalina:
- Dash Attack > FJ N-Air > Luma falls offstage.
- U-Smash kills Rosalina at around ~95% on FD with perfect DI, with 60% Rage it kills at ~87% (perfect DI) and with 100% Rage it kills at ~78% (perfect DI). Samus's U-Smash is never staled because it's not a neutral- or a required Combo Move so these numbers are the norm in a Match.
- OoS U-Smash comes out at Frame 11 which punishes Rosalina's Dash Attack and other options very effectively. It also never whiffs against Rosalina's huge hurtbox. A very good early killconfirm punish.
- SH CS flys over Luma and hits Rosalina
- Rosalina has to approach, every match up where Samus doesn't have to approach is a good match up for Samus.
- Rosalina's Recovery is predictable, spiking or N-Air offstage for killconfirms.
- Samus doesn't rely on grabs, so Luma won't defend Rosalina much against Samus's approach game.
- SH N-Air & perfect framed RAR SH B-Air connects on Rosalina's big hurtbox, these moves send her offstage very early. B-Air can also kill very early.
- Frame Perfect SH U-Air fully connects on standing Rosalina, that's something no other Samus player did on previous Tournaments, and it's a big deal. Gamechanging for many Match Ups, and Rosalina is one of them.
https://www.youtube.com/watch?v=qEC6rkLYV-c
Samus Cons vs. Rosalina:
- Rosalina's D-Air beats Samus's U-Air & Up B
- Rosalina can Down B all of Samus's Projectiles
- Bad Landing Options against Rosalina (U-Air beats everything)
- Luma protects Rosalina against projectiles if Samus does shoot on the ground.
Rosalina & Luigi are the best high tier Match Ups for Samus. (Maybe Bayonetta also, but it's too early to tell, but what I can already tell is that Bayonettas BnB Combos won't connect against Samus even at 25% if Samus holds the Analogstick upwards while being hit. She's also tall and light, good for early OoS U-Smash kills)
For Customs:
Melee CS got buffed huge in 1.1.3, it can kill Rosalina near the ledge at under ~70% with perfect DI and without Rage. With Rage it can even kill her at ~40%. Melee CS can't be absorbed and Luma can't defend it.