Tottoko Hamtarou OVA 4: Hamuchanzu no Mezase! Hamuhamu Kin Medal - Hashire! Hashire! Daisakusen

Considered the prequel to the fourth Hamtaro game (fifth in Japan). In this tribute to the 2004 Olympics, Hamtaro and the Ham-Hams are tasked by Prince Bo with lighting the everlasting torch to Hamcropolis. However, the Rainbow Girls will not allow this and pursue the Ham-Hams. (Source: Wikipedia)