One of the few Kamen Rider games to make it to the US! Based on one of the few Kamen Rider TV shows to make it to the US. And as far as I know the TV show was the first Kamen Rider to actually be called by it's Japanese name of "Kamen Rider" as opposed to the English translation "Masked Rider" (There actually was a Masked Rider show which was the American port of Kamen Rider Black RX).
The game has pleanty of 2.5d and 3d graphics. Also it has a story and vs mode, the latter of which is like a normal 1-on-1 fighting game, the former has elements of fighting but also action and adventure. I just discovered this game by looking at the trailer when visiting the Kamen Rider Dragon Knight official website.
Check out the cool trailer for the Wii game Kamen Rider Dragon Knight.
By the way it's also available for Nintendo DS.