Tom of T.H.U.M.B.

Tom of T.H.U.M.B. . is a Japanese-American-Canadian animated series produced by Videocraft International of North America, and Toei Animation of Japan. ABC would run the series in the United States on Saturday mornings between September 6, 1966, and March 4, 1967, as it was bundled with The King Kong Show.

Plot

One day, Tom is sweeping in the laboratory, he then falls down the stairs and is recovered by his Asian sidekick Swinging Jack. The two are accidentally zapped with a raygun, shrinking them to 3 in tall.
The pair become agents of the miniature bureau of T.H.U.M.B. by their bad-tempered boss Chief Homer J. Chief to foil the plots of M.A.D., who are an agency of black-hatted and black-coated villains determined to destroy the world for their gains.

Characters

Tom
Japanese voice: Shinsuke Chikaishi
Head of T.H.U.M.B., him and Swinging Jack were shrunken.
Swinging Jack
Japanese voice: Shun Yashiro
Tom's Asian sidekick, who was also shrunken.