Let's Play Doki Doki Yuuenchi (1) - Indian Heads Drop Giant Balls? - YouTube
Famicom NES Game SP888 4in1 Doki Doki Crazyland,Adventures in The Majic Kingdom | eBay
Doki Doki Amusement Park
Doki! Doki! Yuuenchi (Japan) ROM < NES ROMs | Emuparadise
Amazon.com: Super Mario USA (Brothers 2/Doki Doki Panic), Famicom (Japanese NES Import) : Video Games
Super Mario Bros. 2 / Doki Doki Panic Port Comparison - RetroGaming with Racketboy
Doki Doki Panic Gameplay - YouTube
Doki! Doki! Yūenchi: Crazy Land Daisakusen - Wikipedia
Yume Kōjō: Doki Doki Panic | Nintendo | Fandom
Longplay of Yume Koujou: Doki Doki Panic - YouTube
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!
Audio Differences- Doki Doki Panic vs. Super Mario Bros. 2 - video Dailymotion
Doki! Doki! Yūenchi: Crazy Land Daisakusen - Wikipedia