About this season
A series of mini-episodes in which the four Imagin from Kamen Rider Den-O promote the theatrical double feature Kamen Rider Kiva: King of the Castle in the Demon World and Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!. In addition, the upcoming Saraba Kamen Rider Den-O: Final Countdown is announced.
Episodes (4)
1. The Demonic Castle Mystery is Solved!
Aired 19 July 2008 • 2 min
Episode 1 of King of the Crimson Castle.
2. Samurai's World Warriors
Aired 26 July 2008 • 2 min
Episode 2 of King of the Crimson Castle.
3. Fight! Kaijin Army
Aired 2 August 2008 • 2 min
Episode 3 of King of the Crimson Castle.
4. Momotaros is King of the Crimson Castle
Aired 8 August 2008 • 3 min
Originally shown 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.