How can I get a Casteliacone and what does it do?

Question

In Castelia City (B/W) There is this shop that sells "Castelicones" and I can never get one. It always says come at a different time, and in the winter it's closed. Also is it like a Rare Candy, or a happiness...thingy?

Answer 1

you can only get it at Tuesday, only at Spring, Summer and Fall

Use-
just like full heal, but edible
You can sell them to the ingredient lady on Route 5 for $2000.