Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!

Gentaro (Kamen Rider Fourze) aims to become friends with Kamen Rider Amazon in hopes of obtaining the Clear Drill Switch, which has crash landed in the Amazon River. However Amazon has been defeated by an upgraded Suddendath, and it's up to Kengo and Yuki to find Kamen Rider Amazon in the Rain forest, while Fourze takes on Suddendath!

To promote the Kamen Rider Fourze movie "Kamen Rider Fourze the Movie: Space, Here We Come!", Toei released this series of digital clips. A total of 28 webisodes were created, each divided into categories like the game show style "Horoscopes Ogiri" segment and "Shake Hands in the Rabbit Hatch". Two such categories like "Principal Hayami's Special Interview" and "Melancholy of Sarina Sonoda" serve to provide backstory for the main series.

In the World of Ganma, Chikara Saionji is revived, his spiritual remains entering an empty Ganma Eyecon shell. He soon spots Alain and the Fukami siblings, Makota and Kanon, nearby. Unaware of what has happened since his death, he brings out an old photo of the original Ghost Hunters team, remembering what he is there to do. This story is set after the epilogue of Kamen Rider Ghost RE:BIRTH: Kamen Rider Specter, which itself is set 2 years after the events of Kamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider.

This Hyper Battle Video features the Kangaroo Medal, which is used by Kamen Rider OOO to transform either his arms or legs to have kangaroo-themed powers, resulting in the "Takagaruba" and "Takatoragaru" Combos respectively.

A mysterious Dopant only known as the Donburi Dopant appears. Philip discovers that the only way to defeat it is to find out what kind of donburi meal it is filled with. The Narumi Detective Agency cook different original donburi meals, the "Hard-Boiledon" by Shotaro, the "Acceldon" by Ryu, and the "Doubledon" by Akiko, with Philip being the judge of the contest to discover what is inside the Dopant!

A princess from a land of jewelry and Kiramai Stones comes to Earth in search of people with a “shining spirit” called Kiramental, a source of outstanding charm and talent. She seeks them out to make them into warriors to defend Earth from an evil army. Five are chosen by the Kiramai Stones, which transform into sentient vehicle companions known as Mashin. Using these powers, they fight the evil army bent on robbing people of their hope and radiance.

Kamen Rider 4 is a web series which was released as an accompanying special to the film Super Hero Taisen GP: Kamen Rider 3. It introduced a new rider, Kamen Rider 4, who is the fourth Kamen Rider cyborg created by Shocker after Kamen Riders 1, 2, and 3. The plot goes around a time loop created by the Shocker that resets whenever someone dies, but whenever the loop resets Shocker itself somehow grows stronger and stronger. Thus, it is up to the Riders to decide whether to keep on fighting a useless battle... Or end the loops for good by sacrificing one of their own.

This special takes place before episode 42 of the Kamen Rider Build TV series. Misora, who has gotten irritated with Gentoku’s Fashion Sense, takes him out for shopping to buy new clothes. Over there he meets a boy but...

The DVD is set before the Hyper Battle DVD, and features the content normally found in the Hyper Battle DVD (explaining the powers and weapons of the Kamen Riders), explained as Tachibana, with Ryusei and Gentaro's help, gathers the data of the 40 Astroswitches to find out what and where the mysterious mass of Cosmic Energy is.

Kouta and Kaito learn their Lockseeds rusted as they and Mai are visited by the mysterious girl who cryptically tells them the best way to restore the Lockseeds is to make them "fresh." From cleaning the Team Gaim garage to Kaito making a fruit tart and then Mai setting up a fashion show, future Mai explains the final step is a fresh smile. Though Kouta succeeds with his Lockseed transformed into a Fresh Orange Lockseed, Kaito is disillusioned and decides to go Hellheim Forest. Found by Kamen Riders Zangetsu and Ryugen, who respectively equip the Mango and Pine Lockseeds, Kaito becomes Kamen Rider Baron Kiwi Arms to call out Kouta as he transforms into the shiny Kamen Rider Gaim Fresh Orange Arms.