|This article is about a/an miniseries in Kamen Rider Den-O.|
As a tie in with Kamen Rider Kiva: King of the Castle in the Demon World, the Tarōs starred in a series of four short episodes called Momotaros's King of the Castle in Burning Red (モモタロスのまっかっか城の王 Momotarosu no Makkakka-jō no Ō), where they get into another crazy adventure as they take the Ginjiro out for a spin. The first three episodes are one-minute-long, airing from July 20 to August 3 after Kamen Rider Kiva, depicting the Taros in reviewing the Go-onger and Kiva movies before Ryutaros is kidnapped by Kamen Rider Rey. The fourth two-minute-long episode showed in theaters after Kamen Rider Kiva: King of the Castle in the Demon World and Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!, with Ryutaros found by Momotaros as reenactments of the two movies by the Taros are played on the movie screen. Toshihiko Seki reprised his role as the Imagin Momotaros and Kōji Yusa, Masaki Terasoma, and Kenichi Suzumura also reprise their roles as Urataros, Kintaros, and Ryutaros, respectively. There was a "Burning Red Ver." (まっかっかVer. Makkakka Bā) and a "Yellow Ver." (まっきっきVer. Makkikki Bā) of the short film, shown at specific theaters based on the announcement that Saraba Kamen Rider Den-O: Final Countdown would be playing at that theater.
- The Castle in the Demon World Mystery is Solved! (魔界城の謎を解け！ Makaijō no Nazo o Toke!)
- Samurai World's Warriors (サムライワールドの戦士 Samurai Wārudo no Senshi)
- Fight! Kaijin Army (戦え！怪人軍団 Tatakae! Kaijin Gundan)
- Momotaros's King of the Castle in Burning Red (モモタロスのまっかっか城の王 Momotarosu no Makkakkajō no Ō)p