Kamen Rider Den-O + Shin-O is the title of a special episode of Crayon Shinchan initially played as part of a full hour special titled Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O 60 Minute Special!! that aired on August 3, 2007. It featured a crossover between Shin-chan and the tokusatsu series Kamen Rider Den-O, as well as three normal summer-themed episodes. The Den-O characters are drawn in the style of Shin-chan's regular characters.

Momotaros' Summer Vacation (モモタロスのなつやすみ, Momotarosu no Natsu Yasumi), abbreviated as Momo Natsu (モモなつ) is a short film that debuted between Juken Sentai Gekiranger: Nei-Nei! Hou-Hou! Hong Kong Decisive BattleIcon-crosswiki.png and Kamen Rider Den-O: I'm Born!. Using live action photographs, 3D computer graphics, and traditional animation (all of which is termed a Momotion Picture (モモーションピクチャー, Momōshon Pikuchā) by the production team), it has Momotaros gloating of his strength until Master Sha-FuIcon-crosswiki.png dared him to prove it by swimming. After being made fun of by Urataros and Ryutaros, and bashed by Kintaros, Momotaros is talked into believing he can swim by Deneb. But as the "mind over matter" influence wears off, the Imagin and Master Sha-FuIcon-crosswiki.png of the Gekirangers tell the audience the movie's coming up soon.

Alongside Climax Deka, the animated short Momotaros's Let's Go Kiva! (モモタロスのキバっていくぜ!, Momotarosu no Kiba'tte Ikuze!) was shown as a double feature and is a Momotion Picture (モモーションピクチャー, Momōshon Pikuchā), much like Momotaros's Summer Vacation in using live action photographs, 3D computer graphics, and traditional animation. In it, Kivat describes the history of motion pictures until Momotaros knocks him off and wonders what kind of movie they're going to be in, imagining a pirate movie. But the other Tarōs have different ideas of their own, from Urataros' Romance film to Kintaros's Wabi-sabi and then Ryutaros' animal movie. By the time Kivat throws in his own ideal movie, a biopic telling his life story from 22 years ago, the credits to the short start up and he bites Momotaros in frustration while the other Tarōs leave to see the movie.

The animated short Imagin Anime: Momotaros Forever! -Imagin Terminal Station-/The Movie (イマジンあにめ「モモタロスよ永遠に－イマジン終着駅－／劇場版」, Imajin Anime Momotarosu yo Eien ni -Imajin Shūchakueki-/Gekijōban) was shown as a double feature with Saraba Kamen Rider Den-O: Final Countdown. In the short, Momotaros feels bad that it is really the end of Kamen Rider Den-O as Urataros assures him that all good stories have to end sometime. After Kintaros and Ryutaros try to make sequels to classic stories that cannot have a sequel, the Imagin end up on the moon in homage to Galaxy Express 999, embracing their final story (although some feel uncomfort to their new surrounding) . But a later retelling of this short, Be Forever Momotaros: Imagin Terminal Station (モモタロスよ永遠に　～イマジン終着駅, Momotarosu yo Towa ni ~Imajin Shūchakueki), provides an alternate ending where the story does continue with numerous new characters and Momotaros freaks out about it.