The Realm

The Realm, also called the Realm of Dungeons and Dragons, was a land on a world somewhere that was not in any way, shape, or form related to the Realms of Toril.

History
A group of youngsters from Earth—Hank, Eric, Diana, Presto, Sheila, and Bobby—became stranded in the Realm, where they were met by an entity known as the Dungeon Master and a unicorn foal named Uni. They would seek a way back to their home.

However, it was said that they and their unicorn were all slain horribly by Tiamat, long before the mid-to-late 14 century DR.

Despite, they would later somehow find their way to the Realms (no relation) on the world of Toril one way or another.

Description
The Realm was a savage place with only a few pockets of civilization spread across the land. The Dungeon Master described it as "an exciting place of wonder and beauty—and grave danger". It presumably included both dungeons and dragons.

Background
The Realm, or the Realm of Dungeons & Dragons, is the loosely defined setting of the Dungeons & Dragons cartoon series of 1983–1985. It is not in any way, shape, or form related to the Forgotten Realms setting or the world of Toril. Despite this, since the end of that series, the characters of the cartoon have made no less than four cameo appearances in Forgotten Realms sources, before having a comic series of their own set in the Realms (plural), Saturday Morning Adventures, which mistakenly calls the Realm 'the Forgotten Realms' and assumes it to be on Toril.

To maintain focus on the Realms (plural) and avoid further confusion, only information from Forgotten Realms sources is included here and the Realm is considered not to be a part of the Realms.