On the recent discussion, Chalice is a Rider, Joker and Tackle aren`t. End of story.
The Chalice which was unsealed by Leangle using Remote card in the forest in eps. 35/36 IS NOT a Kamen Rider. He's a mere Kaijin in Blade series.
But the Chalice which is actually the Black Joker Undead (with Aikawa Hajime persona) in disguise IS definitely a Kamen Rider. He's a hero.
On the other hand, the violent Black Joker Undead himself (without Aikawa Hajime persona and not in Chalice form) IS NOT a Kamen Rider for sure. He's the ultimate Kaijin in Blade series. Case closed.
Am I the only one that wants Kagami to say that "Riders shouldn't be fighting each other" quote from the Kabuto movie? He says it in the Kabuto game, and it's one of my memorable quotes from Kagami. I want him to say it in his pre-battle intro in this game, especially since Yuki Sato is voicing him!
Why not. If I'm not mistaken Gatack has that not-wanting-riders-fighting-against-each-other thought too in Kabuto series.
I'm looking at you Eternal, Poseidon, and King's version of Dark Kiva.
Using that logic, then, that goes to Psyga, Ouja, Odin, Ryuga, Nega Den-O, Rey, Arc and the likes too. They're all pure evil right.