>>13325868late as hell answer, but yea, it was the underground+bases, however the only way to access said base was to dig in one of the specific parts of the overworld, and i couldn't send it to friends, they could only access it for as long as both were in the underground.
gen 3 however, it was cool going around, filling my pokedex after exchanging data with a bunch of random people, and suddenly finding a hole in a wall, and a random trainer there with his own base.
