Where'd the everstone go?

[dugtrio's diglet]

How do you obtain an everstone? I need it to pass down natures from my ditto (thanx to twilightblade) but I cant find it. On serebii, it says there is one in snowpoint city... but I cant find it... will someone tell me how to get it and I don't want to go around catching wild geodudes/gravelers and hope they have the item...

-thanx

[TwilightBlade]

Trade a medicham to a girl in Snowpoint and she'll give you a Haunter with an everstone attached. You can also try digging for one Underground.

[iCE CUBE]

Theres also someone trading a machoke with an everstone. But i dont know where...