I too have a problem playing all my pokemon games except for DPP, I have the r4isdhc "dual core" from 2014, and not just them either but other games too tend to freeze up unexpectedly or when I try to save. I have a class 10 micro sd samsung pixitor from best buy nothing wrong with it.
How do I get my games to stop freezing?
How do I get my games to stop freezing?