Should Rx had a fifth form ?

What was RX's 4th form?

One could argue Black -> RX -> Bio -> Robo. But that's just eh.

Eh, alright, I guess.

Make his 5th and 6th forms ZO and J

I don't buy that. Kotaro could swap back and forth between RX, Roborider, and Biorider, but he couldn't go back to being Black again after the Kingstone split. Hell, Toei spent most of the 2010s treating Black and Black RX as separate characters.

That's because more people liked Black over RX, so they didn't want to wall themselves off the character by making it so Kotaro can't become Black anymore :lol

Also, thanks to ONORE, they can get away with alternate universe shenanigans with no question now.

One of the Rider crossover movies did the Black/RX thing right: the Rider 3 one with the Nazi Youth Go-Kart Team. They actually did the thing where Black got defeated then came back as Black RX. But there was also the Showa vs. Heisei movie where they just showed up together with no apparent explanation.

I'd like to see a KR made by nanotechnology.

Hey!

Been watching Kamen Rider for about 10 years now and there are a few seasons I've missed/not finished. Those seasons are:

Kuuga
Agito
Blade
Hibiki
Fourze
Drive
Ghost
Ex-Aid

I'm looking back and now wondering if I have missed much. Can anyone highly recommend any these shows and if so, which I should watch first? Or have I not really missed much by not watching these shows all the way through?