Ep. 8: The Fires of a Red-Hot Reunion!

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Ash and his friends come across the Kanto Fair, and seeing a Charmander perform on stage reminds him of his old friend, Charizard. He tells Iris, Cilan and N about his and Charizard's history, and everyone agrees that Ash should reunite with Charizard. Professor Oak sends Charizard over, and after he meets Iris' Dragonite, the two trainers agree to have a friendly match. (Source: Wikipedia)