|This article is about a/an half form in Kamen Rider Build.|
As Kamen Rider Build, Takumi Katsuragi had crossed from the World of Build to the World of Ex-Aid via the Enigma device. By robbing Emu Hojo of his "essence", Katsuragi acquired an Ex-Aid Fullbottle, leaving the doctor unable to transform into Kamen Rider Ex-Aid. The Ex-Aid Fullbottle was inherited by Sento Kiryu and was used to create the Doctor and Game Fullbottles when purified by Misora Isurugi. This new pair of Fullbottles allowed Sento, as Build, to assume the Ex-Aid Form, which was especially effective against the Nebula Bugsters. Ultimately, the Fullbottles were returned to Emu Hojo, allowing him to become Ex-Aid again.
- Kamen Rider Build
- Ex-Aid Form (Heisei Generations FINAL: Build & Ex-Aid with Legend Riders)
- DoctorGame Form (Ganbarizing)
Behind the scenes
This Fullbottle is derived from Genm Corp.'s Rider Gashat games which are used by the Gamer Riders, specifically Mighty Action X of Emu Hojo in Kamen Rider Ex-Aid. While Build uses Doctor and Game to assume the form of Ex-Aid on-screen, the combination of the two Halfbodies is seen in Kamen Rider Battle: Ganbarizing. The complete Ex-Aid Fullbottle is paired with that of Kamen Rider Ghost in the toyline.