I'm in postgame. Dexio and Sina don't appear anywhere on Poni Island to give me the key stone. At this point I'm worried I fucked up with PKHeX somehow.
Any information on where the key stone is? I've been searching for it ingame for a few days and haven't managed to find it. Dexio and Sina don't appear on Ancient Poni Path to give it to me, so I'm left confused. Any information on it?