>>39893715Gen 4 was the start of Game Freak adding more outsiders (and foreigners) to their team, which adds a lot more variety to Pokemon designs. By Gen 6, a lot of the old guard have either left the company or retired, so we have a bunch of different designers than before.
>>39892863James Turner's designs are pretty off-beat compared to "conventional" Pokemon designs, which have a more Japanese motif. He approves designs instead of Sugimori from SWSH, so he will approve of concepts that Sugimori might not. Hence why a lot of the Gen 8 designs are completely Western-looking than in the past.