Why had the narrator's friend suggested that he ask Wheeler about Leonidas Smiley?

The narrator's friend suggested asking Wheeler about Leonidas Smiley because Wheeler was known for his storytelling and had a knack for embellishing tales. The friend believed that Wheeler might have an entertaining or humorous anecdote related to this fictional character. This suggestion highlights the playful nature of their conversation and sets the stage for Wheeler's exaggerated storytelling style.