During a made-up and silly sports match, Pooh throws the ball away into an unseen tunnel. The gang goes to discover what it is, only to find that the tunnel leads to the world of Pokémon and meet Ash Ketchum and his starter Pokémon, Pikachu for the first time when they started their journey together. Now Pooh and his brand new friends, Ash and Pikachu set out on a quest to find the legendary Pokémon called Ho-Oh with the help of two other trainers called Sorrel and Verity. After bidding farwell to Ash and Pikachu and had back to the 100 Acre Wood, the gang decided to go on lots of exciting daring adventures awaits them as well as putting on a play (winch leads to Pooh's Adventures of Beauty and the Beast).
- This film will explain how Pooh and his friends first met Ash Ketchum and Pikachu. It also explains how Pooh's Adventures series really began.
- Sooty, Sweep, Soo, Little Cousin Scampi, Annoying Orange, Pear, Apple, Passion Fruit, Midget Apple, Marshmallow, Grapefruit, Grandpa Lemon, Nerville, Princess Sapphire, Choppy and Prince Frank will be absent in this film due to be a past adventure.
- Pooh and his friends will see Ash and Pikachu again in Pooh's Adventures of Pokémon: The First Movie.