I tried to make a small challenge with my dad, a randomly generated team for both of us. We have a copy of both Pokemon Black and Pokemon White. For this, we used an online generator just to have an idea of what Pokemon we would use (Only the name and the nature of each Pokemon. Nothing else). I made the Pokemon in PkHex, made sure that they were completely legal, and then tried to use my Pokemon Black copy, in which I made all the Pokemon (I have used PkHex before and in countless versions, so I made everything accordingly). The game started well, but when I tried to use my PC (so we could check out where I left the Pokemon), but I didn't even get the chance to move as the game had an error. I thought it had something to do with the Pokemon I just made, so I completely deleted them from the game. Yet, the error is still there. What do I do? I don't want to lose the progress of my game...
I have recorded a small video of what I'm refering to.
VID_20200108_211417.mp4