Hey Bill, I have a problem with my Absol, she was my starter and is a wonderful sweetie. Anyway, while in a battle she mega evolved, but a while later in the same fight she just, devolved. She looked alot more tired than usual, she’s incredibly lethargic, and her mega stone shattered. Should I just remove her from battles until she’s feeling better, or take it to Nurse Joy? Is this a sign of old age, or did she just push herself a bit too hard?

Given the fact that her mega stone shattered, that’s definitely a sign that she’s pushed herself too hard. Taking her out of rotation (and perhaps listing her temporarily as a companion instead of a battle-ready pokémon) would be an excellent idea. Give her some time to rest. Then, when she’s more up for it, wean her slowly back into battling. Treat this as you would a physical injury and urge her not to push too hard to get back onto the battlefield.

Best of luck with this, by the way, and may she get well soon.