When the dinosaurs first appeared, the ponies hid within walls. Now that ponies can become dinosaurs, not even the walls can protect them. (Dinosaur King crossover, inspired by Attack on Titan.)
Sento finds himself in Ponyville, where a mysterious villain named Faust steals his arsenal. He must now "build up" new forms by defeating new Smash. Are You Ready? (Kamen Rider Build crossover.)
Decade arrives in an alternate version of the story "Kamen Rider EqG" and must determine how he needs to help the unfamiliar Riders he finds. (Kamen Rider Dragon Knight and Decade crossover.)
The world of G3 is not the paradise it appears. What monsters lurk within the darkness? And what three very different Riders will step forward to fight them? (Heisei Kamen Rider lore / Gen 3 crossover.)
What if Fluttershy’s Nightmare Night fears weren’t unjustified? And what if her costume was the solution? (Henshin One-Shot; Kamen Rider Kiva crossover.)
Together as Kamen Rider Double, Lyra and Bon Bon attempt to discover the mysteries behind the Gaia Memories, and behind Lyra herself. (Kamen Rider W crossover)
When you look in the mirror, what other than your reflection might be looking back? The HuMane 6 attempt to assist an armored vigilante in stopping attacks by invisible Mirror Monsters. (Kamen Rider Dragon Knight crossover)