Found an NES version of Doki Doki Panic on eBay! Thought it'd be a hack of the original sprites on top of Mario 2 but this appears to be the original game!
Famicom ROMs Download - Free Family Computer System Games - ConsoleRoms
Yume Koujou Doki Doki Panic (Japan) [b] ROM Download - Free Famicom Games - Retrostic
Doki Doki Panic, Yume Koujou (FDS / Famicom Disk System) - Vizzed.com Play - YouTube
Yume Koujou Doki Doki Panic ROM - Famicom Download - Emulator Games
Doki Doki Panic Nes Rom Download - Colaboratory
Doki Doki Panic Club!(NES)-Concept Title Screen by RetroReimagined on DeviantArt