A strange mechanical figure from another world. It is not known when or even where it was made. It did, however, seem to have a purpose. Duel-GX was created to defeat that which destroyed the world in which it was created. To accomplish this it began looking for others to help as it started to strengthen itself as well. The first person it identified as its partner was a self-centered girl who held an axe in each hand. As the girl came to know him as "Crab," Duel-GX's circuits began activating.