>>46505901It might not count in the same way as everything else, but I really loved the addition of Cameron the Photographer in HGSS, being able to document your team/journey across the game is such a nice little addition I never see mentioned.
Other than that, I think Battle Royales and Pokestar were both pretty great little side modes that people are put off by bad tutorials, secret bases and the sinnoh underground are cool and I did also find myself using Mantine Surf more than I expected too.