The Captain is a character appearing in Pokémon: Master Quest.
Season 5: Master Quest
When Ash's Pikachu got stolen, the captain helped Ash find Pikachu and battle Team Rocket. However, Team Rocket managed to escape, so the captain gave Ash time to find Pikachu, as Team Rocket caused damage on the ship. Later, although time was up, the captain witnessed that Officer Jenny lent Ash a Pidgeot to carry him back to the ship.