Weird Issue with Fire Red Hack, game resets whenever I attempt to open the bag

[DorkyTryhard]

The Hack doesn't have any major edits done to Hex code or whatever, just some edits of different trainers, some Pokémon Sprites and Stats and some encounter areas. No idea what caused it.
Game worked fine before I edited the sprites, but it was really just the Pokémon sprites, and they all look as intended, and the game has no problems until I try to open my bag. It also happens when I try to buy or sell.

Oh, found out some more info after a little more testing without opening the bag. Apparently not ALL the Pokémon sprites look as intended, in fact, quite a lot of them just have the pixels at the very top of the sprite visible while the rest is just cut off. Can't test past Veridian City because of the catching Tutorial opening up the bag and resetting the game.

In case that information helps as well, I only edited the sprites with Nameless Sprite Editor's draw mode. No importing, just editing pixel by pixel. Would really love to have a solution to this problem that isn't "use the backup from before the sprite changes" because I literally spent 30+ hours editing basically every single Pokémon in the game.

Does anyone have any idea how to fix this problem?

 

[HamtaroTumin]

Thats a huge problem, It can happen on the rom on whom you have tried to edit those things as it has also happened to me, Just try to save your good pokemon sprites that have worked correctly and just import them on an another rom without trying anything new on them, and try to see if it is working, I always fegure this prob in this way, so I dont have I helped you or not, so GL....