Whew boy, you once again go around spouting info like it's the truth, I only said that most Phase 1 Heisei Riders wouldn't show up as Ride Armors due to them already releasing the toys. This isn't a placeholder thing, if we get actual in show forms then they wouldn't have released these toys already.

You keep saying that Wizard and Gaim are seperate universe despite neither show stating or hinting they do, you just use your own weird theories. With Build's ending every Heisei show now takes place on the same world, I'd even say all of Showa and Heisei take place on the same world but I haven't seen much of Showa. But with Ichigo showing up in Ghost without any dimension hopping BS it's safe to assume Kamen Rider through Black RX takes place in the same world, as Kuuga to Build.

Wizard shows up at the end of Fourze, this already establishes that he's from the same world. In Heisei Gens he shows up without any complications or implications of showing up from a different world. Gaim's god like powers could suggest he could come from a different world but AGAIN, nothing implies it took place in another world. He also laments in Heisei Final that the non Sky-Wall Earth was the one he grew up on, implying it was the same world. Ex-Aid's Gorider miniseries also goes into this, Genm had the ability to look up info on Riders, Riders from what you say are different universes. Genm has never shown he has any sort of knowledge of different worlds past the Game World (He created) and Build's world (After Gorider). Another Agito, Baron, Marika and Blade all show up cause he found out they were deceased or missing. Last time I checked, the general internet wouldn't have information on A.R world Riders.

Fourze itself also confirms that Kamen Riders are seen as urban legends, they all have info (and even dress up as older Riders) which once again supports that ALL OF KAMEN RIDER takes place on the same world UNLESS stated otherwise (e.g Amazons).

Well at least Blade and Agito/Kuuga (by extension) take place in different universes (or they used to) since they have dramatically different creation myths (that aren't really myths).

Kabuto's status is debatable since Kabuto's storyline left Tokyo with a giant crater in the middle of it that's never addressed in future seasons despite it being a big deal.

Kabuto is a weird one, that meteor and all that kinda makes you go "We'd see that later on right?" but it could always be explained away with "It was a different city so we don't see it in this city". As they kinda do, I mean the Kamen Rider universe has like 50 Tokyo Towers in different cities.

Kuuga gets referenced by Fourze with in universe footage of Kuuga, and Agito being a direct sequel I'd personally say that's a pretty big indicator it's in the same world.

Alright, ignoring Super Hero Taisens, because I really don't want to use those unless forced to, here's what we have:
By the ending of Black RX, all the Showa series up to that point take place in the same universe. Shadow Moon and a Shin villain later battle Kamen Riders ZO and J in "Kamen Rider World" or something, so all the Showa series take place in one universe.

From a mix of Movie Wars Megamax, Heisei Generations and Heisei Generations Final, W to Ex-Aid all take place in the same universe, which is apparently a really unlucky place to live. Build was a seperate, unrelated universe, until the end of the series happened and glued them together.

The Heisei Series is where it gets messy. Decade implies that they all exist in their own universes, with Kuuga and Agito maybe sharing, maybe not. Den-O and Kiva do have a cross-over, as do Ryuki and Agito, but I haven't seen the Kiva one, so I don't know how well it meshes with the Kiva TV show. Given the SHT films giving precedence to them, you could maybe assume Faiz and Blade both take place in the neo-Heisei universe (from Kamen Rider 4 and Goriders, respectively) but I'm hesitant to do so.

My entire "Showa era takes place in the same world as heisei" is from Kamen Rider Ichigo, they made an effort to have all the Kamen Riders meet up and team up. the Ghost Riders met up with Ichigo, so that's basically my entire arugement for that.

I forgot about that one, good catch. And, by way of the Legend Eyecon specials, which are canon because of Ghost's Endgame, it's canon, so it all works out. Noice.

What if Schwarz became a rider with using Another Ridewatches?

We’ll still have Oma Zi-O as the main antagonist though.

I'm convinced they just don't care about whether series make sense existing in the same world. Unless they want to do a plot where alternate universes are relevant, the crossover assumes everyone is in the same universe, no matter how many plot holes that creates.

Yes, the Driver has sounds for Zi-O/Geiz 1971 and 1989, and every Heisei and Showa Rider but it's very possible that many of those either won't get used or well be a toy-exclusive.

Side note, 1971 is when the first Kamen Rider show aired and 1989 is the year the Heisei era started.

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