Red X is a villain that appeared in X Marks. He is said to have many kinds of gears and weapons which are very deadly, he can also attack swiftly and stealthy.
- Gadgets - Red X has an assortment of gadgets. A known gadget that he has is a grapple gun.
- Advanced Hand-to-Hand Combat - Red X knows advanced combat.
- Weapons Training - Red X is able to use ninja stars and guns skillfully.
- Intelligence - He is very smart.
- Escape Artist - He is easily able to escape from most dangerous situations. In emergencies, he makes portals.
- His True Idenity Is Robin.
- Someone stole Robin's X Suit and became the new Red X.
- The new Red X's name is unknown.