You need to beat stage 12 again to get her stages to unlock. 7 stages. No Cave Story music sadly.
She's a mix of Kawase and Cotton. Shooting down allows you to float very slightly. If you time a jump and shoot down at the same time, you can get a pretty significant initial boost up that'll allow you to skip stuff.
spoiler: https://i.imgur.com/LarHqbd.jpg
It's been a long time since I've played Cave Story, but most of the stuff at the end wasn't familiar to me at all.
Quote from: Drifter on July 09, 2019, 02:49:53 AM
It's been a long time since I've played Cave Story, but most of the stuff at the end wasn't familiar to me at all.
Assuming I know what it is you are talking about. It is not familiar to you because it's not from Cave Story.
It's from Blade Strangers.
Let's just say it gives a convenient explanation for how Curly ended up in Umihara Kawase's world.