Episodes: 1Status: Completed
Alternate Titles: Hamtaro OVA 2, Tottoko Hamutarou: Hamuchanzu no Takara Sagashi Daisaku Hamuha! Sutekina Umi Nonatsuyasumi , ハムちゃんずの宝さがし大作戦〜はむはー!すてきな海のなつやすみ〜
As Laura heads out to summer camp, Hamtaro and Oxnard come across a young girl by the name of Haibi, who's trying to find the ocean. Haibi found a treasure map while searching through the storage burrow and is now willing to find the treasure to help her heat exhausted granny. The Ham-Hams, who are more than willing to help her, pack their things and set out to find the treasure.