The Tiki Demons, or Wiki Tikis, are the secondary antagonists of Aloha, Scooby-Doo!.
The Wiki Tikis are monstrous, brutal demons who are hell-bent on overrunning Hawaii. Their leader is a colossal, ogre-like monster, the Wiki Tiki.
We first catch sight of the Wiki Tikis terrorizing a surfing competition. Manu, a surfing Champ, fears the spirits will be unhappy if the competition is set on the island. The monsters attack the townsfolk and capture Manu's girlfriend, Snookie. As such, the villagers fear the Wiki Tiki's curse.
When Scooby-Doo and the gang arrive in Hawaii, they are excited for the surfing contest until they realize that the island is under attack by the Wiki Tikis.
They discover Snookie in a huge cave, but the leader of the Wiki Tikis abducts her once again. The Mystery, Inc. gang also finds out that the Wiki Tikis are remote-controlled robots.
The Wiki Tiki is finally defeated when the friends outsmart him and knock him into the waves in the contest. The Wiki Tiki is believed to be Manu, who used the legend and the monsters as a plot to get his money, and Snookie aided him.
The Wiki Tikis attack once again, but Scooby-Doo controls them to dance.