Watch Tottoko Hamtarou (2000) - 9anime
He’s small, fluffy, and absolutely adorable: Hamtarou is one perfect little hamster! After moving to a new house with his owner, 5th grader HirokoHaruna, Hamtarou discovers other hamsters and quickly makes friends.
The group of hamster explorers call themselves the Ham-Hams, and there’s nowhere they won’t go. The Ham-Hams go on crazy adventures all around the city while their owners are away, visiting everything from plays to magical lands of candy. Meanwhile, the humans face their own dramas..
Hamtarou meets a huge cast of different personalities, gets himself into—and out of—some pretty tight spots, and even helps Hiroko and her friends out more than once. Through it all, he never stops being unbearably cute. It’s Hamtarou time!