Pokemon - episode 59 - 19 Aug, 1998

Pikachu successfully dodges Magmar's Fire Blast but is left hanging over the edge and is left injured. Upon realizing that no Gym Badge is worth losing Pikachu and that he would be disqualified if he continues, Ash forfeits the match but vows not to leave Cinnabar Island until he has beaten both Blaine and Magmar in a rematch and won the Volcano Badge. But when the Gym and island come under threat after Team Rocket's interference, Ash, Ash's friends, and Blaine's Pokémon work together and eventually triumph in preventing the volcano from blowing which would destroy the island. As thanks, Blaine agrees to have a rematch with Ash. Ash's Charizard decides to battle Magmar in a one-on-one match to the surprise of Ash and his friends. After an intense battle where Ash looks set to lose, Charizard manages to turn things around by using its Seismic Toss which results in Magmar being knocked out and finally granting Ash his Volcano Badge. (Source: Wikipedia)