RizeGreymon

RizeGreymon is a Cyborg Digimon who has mechanized more than half of his body. He flies across the sky and defeats the enemy despite his lumbering big body. It is said that the offensive abilities produced when he fires the huge revolver on his left arm is akin to a nuclear warhead. In addition, the barrel is made from Chrome-Digizoid so that it can produce powers itself. He is similar to his Adventure counterpart MetalGreymon in terms of sheer power and speed.

Digimon World Data Squad
RizeGreymon is an unlockable digivolution.

http://digimon.wikia.com/wiki/User:Maitkarro/DW_Data_Squad#RiseGreymon

Digimon World DS
RizeGreymon digivolves from GeoGreymon.

Digimon World Dawn/Dusk
RizeGreymon digivolves from GeoGreymon, and can further digivolve into ShineGreymon, or DotShineGreymon.

Digimon World Championship
RizeGreymon will digivolve from GeoGreymon with 10 battles, with 50% won, and will digivolve to ShineGreymon with 18 battles, with 50% won, 40 Vaccine AP, 40 Dragon AP and an Egg Revert or VictoryGreymon with 30 battles, with 50% won and 2 egg reverts.

Attacks Attacks in Digimon World Data Squad
 * Trident Revolver: Fires three bullets from his revolver.
 * Rising Destroyer: Fires a barrage of beams from the six guns on his wings and the two on his chest.
 * Solid Strike: Charges at his enemies using his revolver to deliver a finishing blow.
 * Crack Bullet: Fires a barrier-piercing bullet.
 * Barrel Smash: Uses his revolver's barrel to attack.
 * Barrel Blow: A stronger version of Barrel Smash.
 * Heavy Barrel: A full-power version of Barrel Smash.

Variations / Subspecies
 * MetalGreymon