For this particular use case, the latest stable release of PKHeX works fine with editing trainer customization values for Gen6, both male and female. I recently updated the structure to fix any past issues: https://github.com/kwsch/PKHeX/commit/3fdf1396aa8a042566410e7dd180011da8b4fc76
JERMEY stuff is just wild captures from the game. Literally nothing special besides it was an official cloned PKM.
I'm not sure if they've been vetted to RNG conditions being able to encounter the encounterslot with the PIDIV, but I wouldn't be surprised if they were debug-ROM forced encounters (ignoring encounter slot and Method H nature loop).