Because I beat the puzzle that happens post-8th Gym, but he's still there planning Tricks, does he have another puzzle, and then I get higher than his level of greatness? Or am I done and he's just doomed to an eternity of standing there puzzling about how to make a good puzzle.
There is a post-game trick house puzzle. There is only 1 though. In ORAS, it doesn't exist. Source: https://bulbapedia.bulbagarden.net/wiki/Trick_House