As I was playing through the Battle Frontier, at some point a bug had erased all my Pokemon’s held items.I’m not exactly sure when or how, but everything was replaceable anyway except for my Delta Galladite. I tried reloading my backup saves but they had unfortunately all taken place after the bug had occurred. I even rechecked the Whirl Islands for another Delta Galladite, to no avail.
Is there any possible way I can recover the mega stone, or is it lost for good?