Here is a little battle scene with three original Kamen-Riders 仮面ライダー from across the Multiverse, two heroic-riders fighting a Dark-Rider villain.

Ash Satoshi サトシ灰 is a Pokémon-trainer who goes by Kamen-Rider Raikuchu 仮面ライダーライクチュ and armed with his trusty Electro-Gun weapon.
Hiroshi Kikai キカイひろし aka Kamen-Rider RZ 仮面ライダーRZ, a Rider based on a RC toy-car/tank that has a non-humanoid base-form armed with the RZ Pulse-Cannon.
Tokageトカゲ is a wolf-like Kaijin that uses the Shatter-Driver to become the giant, armored insect-based Kamen-Rider Necroside 仮面ライダーネクローサイド and is armed with the Bone-Cutter sword.