After Dande's Drapult is defeated, Dande gains some momentum and begins to turn the tables. Satoshi's Kairyu is taken down by the opposing Gorirander, who is then knocked out by Uonoragon. However, Uonoragon is beaten by Dande's Aceburn moments later. With just one Pokémon remaining, Satoshi sends in Pikachu to go up against Lizardon. After each Pokémon uses their strongest attacks, the clash causes Mugendina to reawaken and interfere with the heated battle. (Source: Wikipedia)
