Congrats on the release of Samus!
A couple of really minor things I think should be addressed:
-When Helpers are disabled, it still takes 3 seconds for the round to actually begin after everyone's intros are finished.
-Stage BGM isn't muted during her round 2 victory pose.
-EDIT: It's hard to notice, but the stage BGM is muted for only a split second when she's KOed. Perhaps mute it for a little longer, or don't mute it at all?
Also, unrelated to Samus, but if you aren't currently busy with another character, I want to give you a reminder to make Simon's BGM stuff consistent with your other characters and fix that Thonolan typo:
Spoiler, click to toggle visibilty
EDIT 2: Just joined the Famicom Fighters Discord, this may be the last time I report something here.