>>54597309Because neither GameFreak nor The Pokemon Company created the Orre games. They're the literal black sheep of the franchise, coming from a weird period where another developer was allowed to create their own Pokemon game that featured a campaign and the same battling mechanics as the core games, and twice for that matter.
Remember, the Genius Sonority that made Colosseum and Gale of Darkness was absorbed into GameFreak sometime before Gen 5's Pokemon designs were in the works, and basically everyone except James Turner was put into grunt roles with no ability to influence the games significantly in order to make it so that even if anyone lived long enough to potentially take the mantle of Director or Producer, they'd be just as old, jaded and out of touch as Masuda or Ohmori, ensuring that quality they were capable of squeezing out for the Orre games was no longer present.