Skull Knight

The Skull Knight is a minor villain in Yu-gi-Oh! GX. He's a servant to the Supreme Ruler.

Appearance
Skull Knight is a green humanoid with a skull for chest armor, and helmet.

Yu-Gi-Oh! GX
At the time the Supreme Ruler was ruling the Duel world some monster were trying to rebel. One of the was led by the Ancient Brain. When Axel found out that the Ancient Brain was really a traitor both the Skull Knight and Axel Duel each other. It seemed that Axel was losing became Skull Knight summoning his most powerful monster; Lycanthrope and was using it effect, however Axel fought back and won the duel.

Deck
Skull Knight's Deck is called the Lycanthrope Deck. His strongest card is the Lycanthrope, because of it's effect.

Trivia

 * Skull Knight can shapeshift into Ancient Brain which ironically is one half of monsters needed to fuse into Skull Knight, the othe being Tainted Wisdom