Greymon (Fusion)

 is Christopher Aonuma's main partner.

Decription
Attacks
 * Mega Flame: Attacks with a high-temperature jet of flames that burns his surroundings to cinders.
 * Atomic Tail (Blaster Tail): Drives his tail into opponents for 360° around himself.
 * Horn Strike: Assaults the opponent with a technique effective for both approach and retreat.

MetalGreymon
 is the DigiFuse of Greymon and.

MetalGreymon is used when Christopher is attacking the Bagra Army in an unnamed Zone, but soon degenerates back to Greymon and MailBirdramon. Later, Christopher digifuses Greymon and MailBirdramon, so he can fight against 's army in the Lake Zone, and even later helps the Fusion Fighters fight while they are in a difficult battle with IceDevimon himself.

He easily defeats both and  in the Jungle Zone, but is beaten up and almost killed by an infuriated. However, MetalGreymon is saved by. MetalGreymon aids in his battle against AxeKnightmon, but is severly beaten by, until  decides to join the battle.

In the Dust Zone, MetalGreymon and the other members of Blue Flare attack the Fusion Fighters under the command of a brainwashed Christopher. After Mikey saves Christopher, MetalGreymon takes part in the battle against Midnight and the Bagra Army.

During the battle against, MetalGreymon gains the ability to digivolve into. MetalGreymon is later put into a Dark DigiFuse with shocking everyone especially Christopher. However, he is rescued by.

Attacks
 * Trident Arm: Smashes his claw into the opponent, a technique exceptionally enhanced in offensive power due to adding extremely high-temperature claws on top of Greymon's already mighty strength.
 * Giga Blaster (Giga Destroyer): Annihilates all of the opponents surrounding him by emitting extremely high-energy, homing laser beams at them.

MetalGreymon Cyberdramon
MetalGreymon Cyberdramon is the DigiFuse of and  in which Cyberdramon becomes a huge cannon for MetalGreymon to use.

MetalGreymon Cyberdramon first appears when Blue Flare and the Fusion Fighters team-battle against Midnight and the Bagra Army in Dust Zone. He destroys all the remaining Tankmon and then aids in repelling 's parting strike.

Attacks
 * Cyber Crusher (Cyber Launcher): Concentrates and fires all of his energy.

DeckerGreymon
DeckerGreymon is the DigiFuse of and. MetalGreymon adds Deckerdramon's weaponry to his already considerable firepower.

Christopher Aonuma digifuses DeckerGreymon to fight off after he absorbs his subordinates in the Disc Zone, succeeding with overwhelming artillery. Afterward, Christopher depends on DeckerGreymon to clear large amounts of enemy troops, but he doesn't fair well against strong single targets such as and.

Attacks
 * Plasma Decker-launcher (Plasma Deckerdra-launcher): Shoots a ball of plasma from his arm cannon.
 * Rain of Fire (Cyber Blader): Shoots a ball of plasma from his arm cannon and then fires beams into it from his back cannons to rain blasts onto the earth.
 * Final Spark: If taken down, takes the energy released within his body to his utmost limit and releases it all at once, creating a tremendous shock wave that scorches the earth for 10 km in every direction.
 * MailBirdra-launcher
 * Tera Destroyer

RampageGreymon
RampageGreymon is the DigiFuse of, and.

ZekeGreymon
ZekeGreymon is the digivolved form of, Greymon's DigiFuse form with.

MetalGreymon digivolves to ZekeGreymon while battling, due to Christopher's pride and 's hope. After some resistance, ZekeGreymon swiftly defeats the Dark General with a single blow after fending off his attacks. His might would be repeatedly tested against the Dark Generals, leading to the ever-increasing need to use this form, which eventually becomes his default fighting option. His strength is equal to that of his also digivolved cohort and partner,.

Attacks
 * Trident Fang: Chops up the opponent with a single blow to their trunk.
 * Tail Gun Fire (Destroy Smasher): Unleashes its ordinance while spinning, ensuring complete annihilation of surroundings.
 * Zeke Flame: Spews the flames of hell from its mouth to burn a large army of opponents to nothing.
 * Plasma Railgun: Provides suppressive fire against the opponent with its Plasma Railgun.
 * Final Trident Strike (Final Strikes): Maintains a lowered stance while becoming an arrow of shining light and assaulting the opponent, releasing the energy at point-blank range to them.
 * Hyper Launcher: Shoots a high-power energy shell to deal with opponents at a great distance or high altitude.

Other DigiFuses

 * As MetalGreymon
 * As ZekeGreymon
 * As ZekeGreymon
 * As ZekeGreymon