Kandor

Kandor was once a city located on the planet Krypton. But the evil villain Brainiac reduced the city and it's inhabitants to a tiny size, and placed the city in a bottle. Years later, Superman somehow acquires the bottled city and keeps it safe in his Fortress of Solitude. Although on occasion, Gleek does prove to be menace by shaking the bottle. The Wonder Twins once called the natives of Kandor to help them stop a villain named Captain Nimoy.

Episode Appearance
WGSF: "Terror At 20,000 Fathoms"