Valhal

Valhal is another world, a huge, light-filled domain without a sky. Great stone pillars with otherworldly inscriptions tower everywhere, and strange yet beautiful plants and flowers. The world's name comes from the word for "light", and the people are happy.

That is, until It's All In the Timing, when earthquakes started shaking the place apart! The Sorcerix of the land and her second, Frank, determined that the cause of the quakes was Bad-Timing Boy, and sent Good-Timing Girl to Looniverse-A to stop him. But in fact, there was an entirely different explanation...

Natives of Valhal are known as Valhallies.

Note: It's never made explicit whether Valhal is in another dimension, on another planet, or what. The strange features of the world, including a lack of sky and weird (but friendly) fluctuations in gravity, indicate some other universe with different physical properties.