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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.
Tottoko Hamutaro Hai! is the sequel to Tottoko Hamutaro, or in English, Hamtaro. The series revolves around the 15 original Ham-Hams in short 5-minute episodes. The Hai! series is animated differently from the original series, most notably, the head-to-body ratio is off, and it is also computer-generated in 3-D.
Laura is a typical fifth-grade girl with a not-so-typical pet: Hamtaro! Quirky and curious, Hamtaro quickly makes friends with his fellow "neighbors" after the duo moves to a new town, and a lifetime of adventures begins. Whether it's attending sports festivals, visiting museums in the search for the world’s largest seed or playing matchmaker, the Ham-Ham Friends will stop at nothing to have a good time. When the humans stray, the hamsters come out to play!