My white gamecube controller got swapped with someone else's. Had it at the tourney and as soon as I did that crew battle match, my shield button wouldnt press down normally, like it was stuck half the time. Yesterday I looked at the controller and there's dirt on the non-smooth parts. Mine was 2 two weeks old and was still clean and every button worked.
(This is gonna sound sad lol) If anybody has a white gamecube controller that they know isn't there's cuz it's cleaner and the right trigger is smooth, I'd be very grateful to swap them back out. It's greatly affecting the way I play.