Akuma: *Floating In The Air, With A Cage-Like Circular Purple Aura Of Power* _"I Am SUPERIOR.... To ALL MAN!! >:D"_ Ken: _"o H y E a H ? ? ? ! ! ! D:< ? ? ? ! ! !"_
There is no “shin gouki” in this game. It was the first appearance of gouki as a boss and you could put in a code to play him(even though he is banned in tournaments for obvious reasons). Shin Gouki is in CvS2 and a few others i believe, cyber akuma is in Marvel Super Heroes vs Street Fighter
The thing is, the version of the character that you can use by inputting the beforementioned code is weaker than the one you actually face, given that it can only throw an air fireball instead of two, so making the distinction is nice imo.
That "is" Shin Gouki. The playable version of him is the weaker version that throws 1 air hadoken, the cpu only version is Shin Akuma that can throw 2 air hadokens. Street Fighter Alpha 2 is the very first game you get to play as "Shin Gouki." The Dreamcast version of Super X has a secret playable version called "Tien Gouki" who is basically the same as Shin Gouki but uses the Shun Goku Satsu has his super move. The switch version of Ultra Street Fighter II confirms all of this