|Voice||Dee Bradley Baker|
Hamsters are a species of small rodent that are used as power generators by the KND. They run all day in their wheels to produce electrical power for the various technologies used by the KND. The Sector V Treehouse alone contains several thousand hamsters. They are shown to be mischievous and highly intelligent, in a manner typical of mice and other small rodents in cartoons. Numbuh 3 is very affectionate and friendly to the hamsters, while Numbuh 4 hates them (which is justified, as the hamsters enjoy teasing him by stealing his soda and then spraying it in his face). Numbuh 2 is often assisted by hamsters in developing his inventions.
Episodes in which Hamsters are Prominent
Hamsters first appeared at the end of Operation: C.A.K.E.D., in which a massive army of hamsters is summoned to move half the Delightful Mansion From Down The Lane after the failed attempt to take the birthday cake.In Operation: P.I.A.N.O., a hamster was used as a temporary replacement for Numbuh 4 when he is injured. Then when the whole team thus creating Hamsters Next Door.
In Operation: N.O.-P.O.W.U.H., they were given a vacation by Numbuh 3, causing the Sector V Treehouse to lose its power and leaving them vulnerable to an attack by Gramma Stuffum. At the end of the episode, the hamsters return and save the day by eating the remnants of Gramma Stuffum's Food Army.
In Operation: G.H.O.S.T., a hamster named Chubbo dies and returns as a ghost commanding an army of ghostly hamsters. The living Hamsters were led by Joaquin against their ghostly counterparts.In Operation: F.O.O.D.F.I.T.E., Joaquin grows to enormous size using an enlargement ray and saves the KND from Gramma Stuffum's Slamwich monster.
In Operation: H.A.M.S.T.E.R., an episode focusing entirely on them, they fight the DCFDTL's pet cats and feline counterparts, the Sinister Felines from Atop the Litterbox.
In Operation: Z.E.R.O., the Hamsters attack a citi-zombified Numbuh 5 trying to save Numbuh 3 and Mumbuh 4 from her, but after a brief struggle they are zombified by her themselves. They then help her zombify Kuki and find Wally. Later, they attack Numbuh 1 and Monty Uno in their house. After the two disappear in the bedroom, the hamsters begin to play on the bed. They later attack moonbase with other zombies and are seen chasing the operative with zombie Numbuh 101. They are later dezombified when Grandfather is defeated.
- The Hamsters have their own online Cartoon Network game called "Flight of the Hamsters".