Flamedramon X is a Champion (Adult in the Japanese version) Digimon that has been modified by the X-Antibody in a Upcoming Digimon & Yu-Gi-Oh! Crossover made by Ryuu the Ancient Keyblade Master.
This digimon is a X Digivolved form of Flamedramon when Flamedramon took in the X Antibody from the dying body of SkullMammothmon X during the battle against Lucemon Chaos Mode in the Dark Ruins on File Island while he was trying to protect his partner, Davis Motomiya.
It blasts a barrage of fireballs from its fist at its foes.
It unleashs a wildfire aura from its body that burns away any foes surrounding it.
Flamedramon + X-Antibody
Flame. Dra is short for dragon. X because he was modified by the X Antibody.