Identifying characters

[Kamen Rider ShinkenRed]

http://oving.jp/gallery/n/?id=9

http://www.animevice.com/kamen-rider/10-348/all-images/84-57619/132867_hgjnghn/83-355132/

These are done by the same artist do far as i can tell, but done at different times.

In the first image, there are two characters, in the bottom row I can't identify, the one I can identify is Skull Rider.

As an aside I wonder who can name all the Riders in these.

 

[Igadevil]

Well I think everybody knows Rider 1~OOO.

The others are:

-Taki Kazuya in his Spirits 'skull' duds
-G
-"Imitation" 7 from that weirdo BLACK comic that's usually included with the ZO comic. Although I like to call him Mr. Melty.
-Skullman
-The 'final' form of Gaia from Kamen Rider EVE, aka "We blew two great names on one story!"

The two from the other pic are fanmade guys, Virgo and Skullrider.

 

[Kamen Rider ShinkenRed]

I knew all of them except virgo and skullrider, I was just curious if they were official