One of the rooms in Berva's underground base contains a number of mysteriously useless objects. First, the treasure chest here can not be opened. Upon trying to examine it, there's no message stating it's locked. It will simply not open, no matter what. Second, there's a strange-looking object here that is very clearly meant to stand out, but like the chest, absolutely nothing happens if it is examined. No effect or message appears at all. Finally, there are a pair of YellowFighters behind the wall in the middle of the room that you can't see, but can still fight. Odds are they would have jumped out at you after taking the chest or messing with the strange object, but as neither work, these enemies never show themselves.