Trash bytes are invalid because of this. I've added a bypass for evolving=>nickname unchanged for the Huntail, but again, all 3 Japanese mons are detected as tampered because the save file OT trash bytes were modified and not matching an untouched Japanese save file.
voltorb: ty, added a static encounter definition, now is recognized as a static encounter rather than slot: Gen3: encounter legality tweaks · kwsch/PKHeX@3d7a371