Sun Stone?

[Wevrand]

Heya, i'd like to know if i can get a Sun Stone before Aya. I really need to evolve my Helioptile.

[SilverAngelus]

You can get a sun stone through mining. 

There's also one in Byxbysion (spelled that wrong probably) Grotto, where Mr. Bigglesworth it. If I recall correctly, it's a hidden item and you might need rock smash to get it.