Captain Hamcook (ハムクック, Hamukukku) is a pirate and captain of Team Seahams. He appears in the 3rd movie Hamtaro: Ham Ham Grand Prix - The Miracle of Aurora Valley, Hamtaro Ham-Ham Games GBA game and the Ham-Ham Games OVA (mentioned). He is known in the GBA game as "Captain Hamstern".
His father was also a pirate, as well as his grandfather.