Professor Oak and Tracey are visiting the island where Gary is currently doing research. But not only are Butch and Cassidy tracking their movements, the Professor and Tracey encounter a raging Aerodactyl the minute they arrive on the island! The researchers on the island study ancient fossils, and Gary had the idea to use a piece of amber and a fossilized Egg to revive ancient Pokémon. However, as soon as they revived Aerodactyl from the Egg, it escaped and went on a rampage! Crystal, the little sister of head researcher Dara, asks all her Pokémon friends on the island to help look for Aerodactyl. Sure enough, one of the Farfetch'd sees Aerodactyl and leads everyone to the spot. Aerodactyl is sleeping near the spot where the fossilized Egg was found, but it wakes up and flies off. Tracey tries to grab onto it, only managing to jump off after a wild ride.
Pokémon Chronicles, partly known in Japan as Pocket Monsters Side Stories, is a spin-off series of the Pokémon anime, revolving around characters other than Ash Ketchum.
