>>20435201Probably an app. The previous toy/things usually had something to do with the original games:
Game Link Cable -> Wireless Adapter
Pikachu walker -> Pokewalker
Ruby and Sapphire had the mix records and secret bases which are already being handled by streetpass.
If we can draw from Emerald there was that Bug Catcher kid you trained up as your apprentice, though I don't see why you'd need an external app or device for that.
Maybe some kind of Sevii Islands explorer mini game where you catch HA mons?
