While in Ancient Curios she takes part in the following dialog:
Karlee Chaddis says: Hello, Charys. I have my list, could you get me all of that, especially the last ingredient.
Paige Chaddis says: Mommy? Can I pet Fizzles?
Karlee Chaddis says: Sure, Paige. Just be gentle.
Gil says: Billy says Fizzles used to be a great wizard. But he got turned into a rabbit when one of his spells went bad.
Karlee Chaddis says: Thanks, Charys. C'mon Paige, sweetie.
Since Gil lives in Stormwind it is assumed that the Billy that told this tale is the same boy who wanders around the city with Adam telling fish stories.