Maybe the purpose of the device that holds the stones is to increas the area of skin contact. The stones themselves may be more of lens that focus energy in such a way as to allow mega evolution. What if the trainer and pokemon can only hold the focus for so long, could be the reason that it is only temporary.
Originally Posted by Hexin' Wishes
East Sea Shellos (blue) with HA available
I trade Vivillons for Vivillons and have a All 18 non-event of patterns. Ask!
Dex 718/718 Thank you ShinyPanda! Living Dex: 711/718.
My Friend Code: 1907-9797-0140. In game name: Sage.
I'm using this one for trades and to check safaris for folks.
I'll be periodically deleting older cards from my friend list.
If you still want access just let me know and I'll be happy to add you again.