I trimmed the file size and forced it to load in PKHeX (bypassing integrity checks via a debugger) and it fails to load the majority of your data, indicating heavy corruption.
Party data and trainer stats gone, only really can see a couple boxes without corruption.
Nothing really for "useful" mons.
There's box with a corrupted Seadra, Seaking, Exeggutor, Weezing, but the only thing that remains is their names.