Pokemon Season 1 Episode 46 - Attack of the Prehistoric Pokémon

⁣Arriving at a canyon to find an old fashioned fossil hunt, Ash, Gary and
the gang decided to join in. But Team Rocket arrives and intends to
blow the canyon up. In doing so, Ash, Pikachu and Team Rocket fall into a
pit which is full of awakened ancient Pokémon. Their only hope may last
in Ash's disobedient Charmeleon, which evolves into a powerful, yet
still disobedient Charizard to defeat a raging Aerodactyl.