[FairyKing]

It's not film genres, but I also had an idea for a rider with film reels as the gimmick, and the whole thing would be kinda a celebration of the special effects used in tokusatsu: Kamen Rider FX!

Hero, Suit Up! Fighting Exciting! I'm the real FX!
"I'll play the role of a hero!"
The main rider is Kamen Rider FX, a struggling actor who dreams of playing heroes that bring hope to everyone, but only ever gets cast as an extra because he gets terribly anxious whenever he's the center of attention. However, when an experimental special effects device causes monsters from a film series to come to life in reality, the company that created this device recruits him to fight the monsters and be a hero for real!

His driver is the FX Jector, a belt themed after a movie projector with space for two film-reel-themed collectables. His weapon is the Directana, a katana themed on a director's clapboard (and yes, it shouts "Cut!" to announce its special attack). And his motorcycle is a stunt bike called the Stunt Buddy.

Monster, Suit Up! Demon Extreme! I've become DX!
"Who says I'm a bad guy?"
The second rider is Kamen Rider DX, a major antagonist from the films and a demon who can take human form. Initially an enemy to FX, he has an identity crisis after realizing all his life he's just been following a script that cast him as the villain

His driver is the Dark FX Jector, a copy of the FX Jector he created using the same process that created a dark copy of the hero's powers in the film series (because that happens all the time in toku). His weapon is Doom Michael, a boom mic turned into a scythe by his demonic power.

Costume, Dress Up! Excellence or Execution? Either way, I'm EX!
"I'm changing the script."
The third rider is Kamen Rider EX, an agent of the tech company that made the device which brought the monsters to life. At first she just provides FX with equipment and intel, but as the company higher-ups get increasingly greedy for the monsters' power they order her to become a rider and fight personally, until eventually she turns against them and joins the heroes.

Her driver and weapon is the Camragnum, a gun themed on a movie camera, which she also uses in civilian form to assist FX before becoming a rider.

The collectable devices are the FX Reals, small disks designed to resemble film reels, each with the power of a different special effect or filming technique. Each rider has one for their base form and others for power-ups, which appear as film-themed sashes across their chests:

Usually used by FX
- Hero: Transform into Kamen Rider FX
- Special: Transform into Kamen Rider SFX (FX's final form)
- Prop: Summon the Directana
- Stunt: Summon the Stunt Buddy, a giant version of it forms the bike's front wheel
- Pyro: Add explosive power to attacks
- Slo-Mo: Grant super speed by slowing down time
- Light: Create a bright flash of light

Normally used by DX:
- Monster: Transform into Kamen Rider DX
- Mini: Grant super strength, "the strength of a giant"
- Double: Create a copy of the user (only one at a time)
- Night: Create a cloud of unnatural darkness
- Stock: Duplicate the powers of the last other FX Real used

First used by DX but later stolen by other villains:
- Stage: Open a door to an otherworldly theater, which serves as the monsters' hideout
- Puppet: Take control of a monster
- Crew: Summons the series' footsoldiers

Normally used by EX:
- Costume: Transform into Kamen Rider EX
- Rewind: Restore objects to previous states, used to clean up collateral damage
- CGI: Create energy constructs, tiring to use
- Chroma: Turn the user invisible

There should probably be more FX Reals but I haven't thought of them yet lol.

And it might be the monsters in this idea who are based off film genres, since there's a huge variety of genres to use for inspiration and monsters from related genres could have similarities to each other...