The Oracle is a powerful all seeing wizard that wishes to only help good, but when threatened, had no choice but to help evil. He sees things with a mystical eye that appears on his hand.
He disguises himself as an elderly gentleman that gives out balloons to children.
When Morticon wanted to escape the Underworld, he sent Necrolai to kidnap the Oracle. Though he did not want to help the evil forces, when Morticon threatened to attack the young children of the surface world, he had to choose. He told the evil undead forces that the Gatekeeper was the only way to escape. After providing this information, the Oracle transported himself out of the Underworld.