no you can't check memory after it breaks but before it does you can check like every soft reset check the memory untill you get a black screen and check the memory of the soft reset before the black screen soft reset it is an ntr problem but it could be a memory issue that can be fixedYesterday's update broke NTR in the New3DS, devs are working on fixing it. It still works fine for Old3DS. I'll be working on the offsets for XY soft-reset.
About the other issues:
- No, I can't check memory for the black screen issue, NTR is broken, so I can't read any memory from the game.
- It seems you got the No trade partner was found message, this was correct. As the wiki says it's not tested yet.