When the Luminary and Erik need go back to Cobblestone, they traveled through the Manglegrove forest, however, a bridge is broken and a dog is following them. The Luminary than find out that the reason why the above happened is because Tricky Devil decided to destroy the bridge as a prank to Flint the woodcutter, however the little monster is fed up with Flint when he fixed the bridge again, so it turned Flint into a dog and destroy the bridge. Tricky Devil than hide in a nearby treasure chest to scare people. As a result, the Luminary and Erik came to the treasure chest. And Tricky Devil jumped out to scare them, but failed, it than tried to turn them into dogs, which also failed as they avoided the beam. After getting teased by Erik, Tricky Devil decided to fight them, however it is quickly overwhelmed by Luminary and Erik and is defeated, disappearing in purple mist.
As its name suggests, Tricky Devil is very mischievous. It likes to trick people with pranks, however his pranks often gone too far.