Inner Demons are shadowy creatures that assume the form of Vexx. They always come in a trio, competing against him in the Inner Demon Games. As Vexx wins the rounds, their number decreases. If he beats all three, he wins a Wraithheart.
Vexx must compete in three rounds against them. If Vexx wins that round, the Demon with the least amount of points collapses and vanishes. The game gets easier as each Demon disappears after every time Vexx wins.