Early on in the game I picked up a budew and decided to use it on my team because I have never had any experience with a roselia/roserade before.Also, I figured having a poison-type would help for countering fairy-types. Some extra info: I just defeated the second gym, the rest of my team is growlithe, marshtomp, ursaring, mightyena, and electabuzz.
So my question is: Is/will there ever be a Shiny Stone in the game or am I just wasting my time? If there is no Shiny Stone, any suggestions as to what grass type I can find to replace roselia?