It worked now thank you. I find it strange that my other save would corrupt even though it was called main after I dumped them to the file. Anyways, thank you for the help it is greatly appreciated!
The "Elizabeth" is my girlfriends save and the "Epic Mons" Is a hacked playthrough i made just for fun. The "shiny save" is the save in question. You can see my epic mons was modified last night since thats when i tried just dumping all the pokemon to that save and the game save still corrupted. I will try again right now to see if anything changes. Thank you
If anyone could help me I copied the file to a jksm (save editor) and tried loading it up but always get a save corruption. So I loaded my other save and it works perfectly and even copied all the pokemon from the shiny save to my actual save and it still corrupts the game save. Don't know what could be causing the corruption as loading my other files makes the game boot up. Has to be something about the pokemon. My 2ds is recently homebrewed (The latest method from October 2019) and it runs the usum emulator.