>>33279171Though, thinking about it, it could also be if you've changed the time or systems (which is tantamount to changing the time) that they never fixed the bug I encountered in B2/W2 (which I talked to support about so they should've passed it on).
While I haven't had any issue in the recent games, a few months before the end of the WFC, my main copy of Black 2 got blocked for a bit after a power outage took me offline in the middle of a battle, Without thinking before opening the game the next day, I'd changed the time because it was daylight savings and last I checked it still tells me I have to wait.
In other words, I was permanently locked out and even their support had no idea what to do except restart the game.