To prove to his rival, Gary, that he can find a fossil, Ash finds Team Rocket attempting to blow a canyon. In the chase to prevent the explosion, Pikachu accidentally blows the explosives, making his trainer and Team Rocket drop in the cave below the canyon. There, they find some fossil Pokémon, from which an Aerodactyl wants them to be its lunch. Attempting to defeat it, Ash's Charmeleon goes through an evolution...
The group continue on their way and notice people digging for fossils in Grandpa Canyon. Gary Oak shows up for this too. Ash wants to dig for fossils so that he can find a better fossil than Gary. Gary finds a fossil and an archaeologist examines it. Gary thinks it's the brain of an extinct Pokémon but the professor says it's a Pokémon coprolite fossil (fossilized Pokémon manure).
Meanwhile, Team Rocket plants bombs in the canyon so they can find fossils quicker. Ash notices this just as Meowth lights the fuse. Ash and Squirtle chase it trying to put out the fuse. It gets to the end and Pikachu shoots an electric beam at it in panic. The blast goes off and Ash, Team Rocket, and Pikachu find themselves underground. Squirtle is the only one who escapes quickly enough. Misty and Brock hear the explosion and they run over to it and they find Squirtle. Misty, Brock, and Squirtle quickly start digging to find Ash and Team Rocket.
Meanwhile, Ash and Team Rocket try to find a way out. They meet some ancient Pokémon who they thought to be extinct. Jessie and James say that the blast must have woken up Pokémon that have been sleeping for 1,000 years. The ancient Pokémon are angry at Ash and Team Rocket for waking them up, so they attack but suddenly run off. They are happy the Pokémon left but then they realize why they left: an Aerodactyl appears as it scratched Charmeleon down and grabs Ash, and swoops up into the air.
Meanwhile, Geodude has finally found a hole leading into the cave. A crowd has come to help dig for Ash and Team Rocket. Suddenly, the Aerodactyl flies up out of the hole with Ash in its grasp. Charmeleon wants to battle Aerodactyl, and shows a scratch Aerodactyl made on his forehead and said to apologize, but the Pokémon taunts Charmeleon. Upset for being taunted, Charmeleon angrily stomped its feet and roars to evolve into a Charizard as everyone saw it evolved and a close up of Charizard finally unleashes its Flamethrower. Charizard flies and chases Aerodactyl. Charizard uses Flamethrower on Aerodactyl, but misses. Ash feels Charizard has feelings for him, and to save him but when its Flamethrower burnt Ash, he recognized that Charmeleon had only evolved for taking revenge from being taunted from Aerodactyl.
Misty sees Jigglypuff and asks it to sing so Aerodactyl will fall asleep and drop Ash Jigglypuff happily starts singing. Aerodactyl falls asleep and drops Ash. Ash is caught by Charizard who managed to stay awake before falling into sleep. As everyone are asleep from Jigglypuff's Sing, Jigglypuff was visibly infuriated and putting a black markers on everyone's faces. Officer Jenny tells everyone that it was just a dream caused by Jigglypuff’s song and sends the people on their way because the canyon becomes a danger zone due to the prehetoric Pokemon living in the underground. Ash gets an egg from the site after he was grab hold of it while under Jigglypuff's Sing, which Brock steals from him to take care of it.
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- Each of Gary's cheerleaders had the letters A-F written on their faces while they were asleep.
- Gary found an example of a Pokémon Coprolite fossil.
- The "Who's that Pokémon?" in this episode is Kabutops.
- This episode shows the first carnivorous Pokémon and the first time a Pokémon has actually tried to eat a human.
- When Ash is attempting to put out the fuse lit by Team Rocket, they roll into a boulder, similar to Raiders of the Lost Ark.
- Gary is dressed up just like Indiana Jones.
- Team rocket sang "Rock-a-bye, Baby" at the end of the episode.
- This is the first time a egg was seen, Only to become a cute pokémon from the 2nd generation.
When Ash fell down sleeping, the egg that was found was discolored with red circles, when it should have been with blue circles.
In one scene where Charizard is flying, it's wings turn cream-yellow instead of blueish green
|Other series: Advanced Generation · Diamond & Pearl · Best Wishes! · XY · Sun & Moon|