Smoo is a planet inhabited by the Smoovians and the Sprublians. It is shaped like a squashed oval. Much of its surface is covered by the Moonguzzit Sea, within which rest the Sprubly Islands. Skugbit storms are an occasional hazard. Currently it is ruled by the benevolent King Froptoppit, with his son set to inherit the throne.

Smoo is best known for The Hemmin Spotter, one of the greatest works of literature in the universe, and Bornstone's Elixir, a medicine that cures nearly anything. It was also home to the evil Mulgari cult before they were wiped out.

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