Comet Shard

Does anyone know if there’s any hidden purpose to the Comet Shard? Delta Meloetta was holding it (and I assume it’s always holding it) and the description just talks about selling it for a lot of money. It doesn’t appear to do anything in battle. I just want to make sure that there’s no hidden feature to this item (or even a planned feature) because I feel like you’d only get one of these per game.

You can get multiple and their only purpose is to be sold. Chanseys can also hold them or something rarely.