• English / United States: Hayden
• Japanese / Japan: ハシバ
• Japanese (Romanized) / Japan: Hashiba
• Japanese (TL) / Japan: Hashiba

Hayden is a Pokémon Trainer from Fuchsia City that challenged Ash Ketchum to a Pokémon World Championships Normal Class battle in a park in Vermilion City just after Goh caught his Exeggcute. Before the battle, Hayden's rank was 1,024. The battle was officially approved and was designated as a 1-on-1 battle. He was defeated by Ash's Pikachu but they agreed to battle again if they met again.