Wizard had six by the end of the show. Seven (or more, depending on how you count the movie Mages for the movies :)

Definitely agree with this.

I really don't want to see 5 riders in one show. It clogs things up and focus gets shifted too much.

Proto-Drive and Chaser were the same person though, so Drive had three.

There was Gold Drive which makes it four. Does he not count?

And Jun technically existed for like one episode. Even if he didn't do anything.

Ghost has three confirmed, so it's just a matter of seeing whether the remaining 30+ episodes after the third is introduced are new-Rider-free.

That was such an annoying tease. Thought we were going to get our first good Rider Troops, but nooo...

I don't count him, no. He was a villain with a Rider-like form, but not actually a Rider. Drive's Riders were Drive, Chaser, and Mach.

Plus Bannou said himself that he is an evolved Roidmude, not a Kamen Rider- he is part of the promised number, after all.

Here's a quandary I have. Who was the first Rider to have any kind of form change? Be it something so simple as color or weapons. Who started this chain reaction that is still practiced to this day?