[DecoyBlackMage]

In Decades case they can get away with it because he and his group keep travelling trough worlds, hell even the villain Narutaki shows up in several of the movies so overall they are just going like they did in their own show, actually showing some forms of character development for their characters at least, not much but it is there.

In some of the other riders cases though, what is canon seems to change over time, overall the majority of movies are not canon last I checked, the " what if " movies are kinda obvious, but some of the others do not count either.

Its been a while since I read up on what counts and what does not, usually its interviews or guide books on the franchise, and sometimes what is what changes over time.

Its like trying to make sense of other franchise series like Devilman on what is and what is not canon, another series with multiple additions and an author that constantly changes his mind on what counts or not.

Decade is different though, due to how his show worked, every movie is technically canon for him, since he can enter whatever world he wants.

They can get away with whatever they want with him, on the plus side his actor is quite fun to watch, fun to watch him in Garo as well.