I will tell you that at some point in your playthrough of the game, (I chose volt white 2 so there is a chance it doesn't happen if you choose blaze black 2,) your game will start crashing at every other trainer battle if not more. Not wild encounters just trainer battles. It got to a point for me where the game became unplayable, and I had gotten all 8 gym badges.
Nevertheless, the game is extremely fun, even if you've already played the og B2W2. Highly recommend.
Here is a spreadsheet with everything on it about the game.
https://docs.google.com/spreadsheets/d/1qserfTjpp5JEIO5U3yvHHgZsTm-KZI3doq47X5ABWiU/pubhtml#