VC injection is still have problems. I think only games you need to worry about are ones that need Save patches to save properly or ones that is 8MB rom file size or higher. I tried super street fighter 2 Turbo Revival and it has bugs. The time records in the mini games mode are all set to random numbers and when i got to the last boss, the game froze.
To be honest emulation on 3DS besides VC games are bad in general. I just recommend a PSP since it does it well and has more time to develope, it sure makes impression if you never touched it over the 10 years psp was made and homebrew exist.