The Shelbyville Abe is an unnamed old man who lives in Shelbyville.
He is like his Springfield counterpart, Abe Simpson, in many ways. He has similar facial features and wears similar clothing. They also both wear glasses and tell stories, even saying similar sentences.
While Abe was speaking the story about the heroes of Springfield (Bart and his friends saving the lemon tree) to some children of Springfield sitting under the lemon tree, his Shelbyville counterpart was speaking the same story to some children of Shelbyville, but it was about the heroes of Shelbyville who "had banished the awful lemon tree forever."
At the end, he and the children celebrated with a glass of turnip juice. However, he seemed to be the only one whom enjoyed how the juice tasted, as the children hated it.