Hi.
A little suggestion to make it possible to obtain more than one mega stone. For example - having 2 Venusaur, one bold and one modest; instead of replacing mega stone from one to another, it would be easier to already have stones on both of them.
It could be free, cost some poke$ or pve/pvp coins.
This wouldn't change much since you can use only one mega poke in battle but would be really helpful during changing pokemon before pvp battles etc.
It's neither needed or unnecessary, just would make the gameplay less annoying and smoother for some players.
Thanks.