Problem with this view is you’re gonna see the “holes” in the background (left side of screen lacks texture).
Based on this youtube video from Super Street Fighter IV 3D Edition for the 3ds:
I made a sort of 3ds view, looking like that ryu vs sagat match:
Here are my settings:
It works quite well and you don’t see the faults in the background (I finished Arcade Mode without issue).
And for fun I made Ryu transparent to test a rear view à la Punch Out!!:
(this one is merely for test as it has issues with the backgrounds, it works well but it’s hard to use left/right to go front/back :P)