Yume Koujou Doki Doki Panic [b] (J) ROM Download - Family Computer System(Famicom)
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!
Dream World: Dokidoki Panic (NES) - online game | RetroGames.cz
Yume Koujou Doki Doki Panic (Japan) [En by Vice v1.0] (~Dream World Doki Doki Panic!) ROM < FDS ROMs | Emuparadise