MetalGreymon
Japanese Attacks: Trident Arm & Giga Destroyer

Through the power of "Tactical Armor Reinforcement", MailBirdramon fused with Greymon, becoming a Greymon whose combat power was enhanced but not sacrificed, allowing him to focus on dogfights more. His "Trident Arm" attack is an example of how greatly improved Greymon's attack power is, and its strong power is unleashed through the superheated claws he obtained when he fused, and his annihilating attack of "Giga Destroyer" is a high-energised laser beam that can lock-on to enemies all around him, and whose attack power can be strengthened at a ratio of 1:1 if there are vast amount of enemies, thus giving Greymon an even chance of living and dying in battle.