Issues with GBA VC injects

[Dodge823]

When I am attempting to play an injected VC games on my 3DS (In this case: Classic NES Series: Legend of Zelda) the inputs are super funky, the game seems to be okay but the buttons don’t really do anything except for sometimes.
I can’t figure it out, and sometimes they work for periodic bursts, then they cease again.
any possible fixes?

 

[Kwyjor]

Do the games work correctly in an emulator on your PC?

Have you tried open_agb_firm?

 

[KleinesSinchen]

Might be related to anti-piracy, anti-emulation functions.
Although the 3DS is a Game Boy Advance and GBA injections run bare metal, I assume there could be trouble. Never tried those myself.
https://mgba.io/2014/12/28/classic-nes/

any possible fixes?

A) Use the NES version
B) Emulating the game with mGBA (should work on new series consoles)