Lore: They use the toys/cards/gimmicks of the franchise, but their belts are all the same with slight tweaks to match the gimmick. No one knows how the belts were made but they're there so yeah. 

Denki as Kamen Rider Trainer (Pokémon)

Main form: Pikachu Formé

Katsuki as Kamen Rider Brawler (Bakugan)

Main form: Dragonoid Form

Fumikage as Kamen Rider YaoGuai (Youkai)

Main Form: Jibanyan Form

Tamaki as Kamen Rider Tamer (Nexomon)

Main Form: Solus Form -> Omnisun Form

Jiro as Kamen Rider Ranger (Cassette Beasts)

Main Form: Candensheep Form

Ibara as Kamen Rider Plant (PvZ)

Main Form: Peashooter Form

Tomura as Kamen Rider Zombie

Main Form: Basic Zombie Form

We can add to this as we go lmao- Any suggestions can go down below.