YMMV / Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders

• Complete Monster: Kaisei Mogami is a Mad Scientist with an Inferiority Superiority Complex. Believing himself to be smarter than his former partner, Takumi Katsuragi, Mogami began working for Juzaburo Namba and teamed up with his alternate self, a Foundation X researcher. Creating the Enigma, Mogami intended to use his machine to merge the two worlds and collide them with each other, leaving only him alive as an omnipotent being, the Bikaiser. Using innocent civilians as batteries by infecting them with Nebula Bugsters, Mogami revives the Horoscopes and the Greeed to distract the Riders, ordering Ankh to attack Eiji, fully knowing that he was his best friend, while continuously mocking the Riders with the information that they could watch the destruction of their worlds.
• Hilarious in Hindsight: An antagonist in a crossover show with an interest in parallel worlds and a gimmick known as “gears”.