Jinxer is one of the demons that was sealed many years ago, and a villain in Power Rangers Lightspeed Rescue. He is basically the demonic version of Finster.
Jinxer is very skilled with magic and incantations. He uses cards to summon demons from the Shadow World, as well as use them to make the demons grow. He also can shape-shift into a human form, and is also a skilled hypnotist.