I loved Trick House in RSE, and would take time to finish all those puzzles and mazes whenever I had chance. Plus, it also gave you a way to train your Pokémon before battling a new gym leader. I remember getting myself stuck with Wattson in my first run of Ruby, but managed to get him beaten eventually by training here. One thing I hope to see this time around, though, is even more puzzles. If they can't fit them all inside the cartridge, then maybe they could make these stuff downloadable, which could be saved onto your memory card. I know they said no on DLC for X and Y, but OR and AS are totally different; there's still time for them to implement this feature. :]