All I’ve read says that mega-able Pokémon will mega evolve at lvl.
50 if they’re holding a mega stone. Does that mean that they can
evolve at any point after lvl. 50, or, if a mega-able Pokémon gets
to lvl. 50 when it isn’t holding a mega stone, will it miss the
chance to mega evolve?
I’m worried about this because I have two mega-able Pokémon but no
mega stones, and I’m afraid that I won’t get them before those
Pokémon reach lvl. 50.
You can buy Mega Stones for PD from other players through the
Global Trade Station and the Item Market. Alternatively, you can
boil them yourself in the Gem Cauldron with Gems, if you have
unlocked the recipe :)