Hawkmon X4 is a Composition Digimon whose name and design are derived from "Hawkmon Cross Four". It is a miraculous form called the "aerial warrior", giving Hawkmon, Gaomon's fighting abilities and speed, Betamon's swimming ability, RookChessmon's defence with Trailmon's body on the bottom and on RookChessmon's back, with Hawkmon's wings spread out near the size and shape of Aquilamon's, and Hawkmon's feather on RookChessmon's head.
- Aerial Dive: He heads for the stratosphere, with the enemy in his grasp and throws the enemy down to the ground.
- Aerial Diver Bomb: He heads up yo the stratosphere, tucks his body parts into the body and falls down onto the enemy.
With Kumamon some of X4's body changes, such as the body turns white, and part of Kumamon's headband is on X4's head, and he has the Symbol of Ice on his chest.
X4 gains Sorcerymon's hat and staff.