[Graphics] How do I fix this?

I'm making a FireRed hack utilizing Leon's ROM base, and while editing it and playtesting it, this happened:


It's regarding the visuals of the Pokedex. Where in the ROM is this information stored? Can I fix this with something like unlz GBA?

Looks like a lost cause. If this was an issue that popped up solely by using Leon's ROM base, then I'd contact him and ask. Otherwise, that looks like a problem that can really only be fixed by restoring a backup.

I tried asking Leon on his Discord but got no real response on the matter.