Further info:
Accidentally hit firestone when speaking to the NPC, was hoping somebody could possibly trade me the waterstone for a firestone so I can evolve my staryu i’ve been training.
I know this is a rather odd request but I would really appreciate the help.
And I understand you can buy them later but my staryu will be quite high level by then and I was hoping to evolve it earliar!
Before the third gym there is waterstones for sale at the department store. If you want it earlier, I can buy you one but it’ll have to be tomorrow morning.