• English / United States: Ritchie's Butterfree - Happy
• Japanese / Japan: ヒロシのバタフリー
• Japanese (Romanized) / Japan: Hiroshi no Butterfree
• Japanese (TL) / Japan: Hiroshi's Butterfree

Kanto Pokémon League: Round 5 - Vs Ash Ketchum

Happy was selected first by Ritchie and was up against Ash's Squirtle. Both Pokémon traded blows until Ritchie ordered Happy to use Sleep Powder and managed to put Squirtle to sleep which eliminated it from the battle. Ash's next Pokémon was Pikachu and it quickly launched itself at Happy and managed to pin it onto the arena floor. Happy managed to get back into the air but Pikachu held on and used a Thunderbolt attack to beat Happy which put the battle back on level terms.

Round Six - Vs Assumpta

Happy battles against Assumpta's Venomoth in the sixth round.