Does anyone still play Pokémon Rumble World (fermium) anymore? Cause I’ve pocket a good time to get absolutely obsessed with it at an interesting time

I know it's a long shot, but being desperately in need of diamonds I noticed there's is some kind of friend feature that gives you free diamonds for inviting people over or something.. I know it's way too late in the game's lifecycle of me to expect to anyone to help complete these tasks, but I figured if it were all possible I might find someone here who knows exactly how it works, not holding my breathe or anything, I just really want a few diamonds lol