They can't. They're owned by Game Freak and have no remit to develop core pokémon games (Game Freak even contracting an entirely outside sudio, rather than give BDSP to pone of TPC's lackeys), mjuch less hire staff to work at Game Freak.
Fucking learn how this shit operates kid, it's this way for a reason, Game Freak don't want retard outsiders making the canon, after Sugi had to unfuck Lugia to make it a pokémon.
