Leadramon is a Mutant Dragon Digimon and an Ultimate-class Hybrid Digimon whose name and design is derived from "Lead Dramon". It is the Artificial Beast Warrior of Combined Power, a spirit crteated from the data of the Legendary Warriors. As an artificial Legendary Warrior, its spirit is only compatible with the first person who merges with it. As an Artificial Beast Spirit, it remains sealed in its Human Spirit until its human vessel needs it.
Leadramon's appearance is that of a large, white-scaled serpentine dragon. Its symbol is engraved on its head, which sports two fully red eyes and a mouth full of sharp teeth. It possesses two small arms and a pair of large white wings. Along the upper half of its body are ten bands that coil around the length of its body. Each band sports the symbol of a Legendary Warrior inside a hexagon shape, in this order from top to bottom: Fire(red), Light(dark blue), Ice(yellow), Wind(pink), Thunder(green), Earth(orange), Wood(brown), Water(light blue), Steel(teal), Darkness(purple). Right below the bands, the rest of its body/tail coils around in a circle, with the tail ending a claw that clamps onto the body in order to complete the circle.
- Deseta Dragon: Splits itself into ten smaller dragons, one for each of its band colors, in order to deal with multiple enemies.
- Element Expel: One of its bands glows, then it unleashes an attack of the corresponding element from its mouth.
- Rainbow Devastator: All ten bands on its body glow, then it unleashes a large rainbow-colored laser from its mouth, carrying the powers of all ten elements. Used only as a last resort.