Hi there,
first off, sorry if this is the wrong place to post this, but I'm new to the community and I don't know where it should go.
I'm trying to obtain Rotom. I've completed the 8th gym and went to tanzan mountain to break the rock. However, I do not know how to break said rock. Do I need a special HM/TM or do I need to complete a certain event? I can't even reach the puzzle, I'm just stuck at the pesky rock and it's infuriating.