Because I'm not going to make a theme project for him, NightMare's theme is called: Mephiles' Whisper. The boss themes: NightMare Hedgehog, NightMare Mario & NightMare Luigi: Mephiles Phase 1. Night The Mare: Drawcia Sorceress Remix. NightMare: C-R-O-W-N-E-D Remix.
Hi. Edit: I changed it so that he has less forms, plus NightMare Core now has a different name & will get a proper theme, not saying the Deoxys mashup is bad, just that he's MUCH different than his old design. I'll leave the other forms & their themes here in case you want to use them. You may even change their themes, the old forms not the ones that are listed in Instructions.
