This is also a better fitting crossover then you might think. Remember the giant tablet that fell out of the sky at the beginning of 5Ds season 2? Blade also has a mystical giant tablet

How about OOO & Pokemon?

Kamen Rider Decade x My Little Pony: Friendship is Magic. :D

Shin Kamen Rider X Predator. Who will rip out each other spines first?

Kamen Rider Gaim X Madoka Magica

That's funny. I read a fanfiction with Madoka becoming Gaim. It's called 'Kamen Rider Gaim Magica' by a Fanfiction author named Pega-Rider. You should check it out. It's a good read. :)

Kamen rider fourze x Ben 10 omniverse

Alien hero kitaaaaaaaaaaa!! :D

Fourze X My Little Pony: Friendship is Spacetime.

Ponies kitaaaaaaaaa~!! :D