Megidramon is an Evil Dragon Digimon and WarGrowlmon's evil Digivolution. He was accidentally created by Takato's rage and fury.
Megidramon is the villain Mega Digimon that looks like a giant leg-less dragon with two giant wings, and razor sharp claws and teeth. He also has armor on his shoulders, and on his chest.
Megidramon can wrap his enemies with his mighty tail. He can also produce acidic saliva and fire red lasers from the hazard symbol on his chest that can cause earthquakes.
Megidramon is Guilmon's dark Mega form born from Takato's rage. Takato's anger vanished, horrified of what he had done.
Megidramon seemed to have the upper hand against Beelzemon by wrapping his tail around him and attempted to devour him. However, Beelzemon eventually won the battle by absorbing Makuramon's data, beating Megidramon unconscious, defeating him. Takato cried, knelt down by the unconscious Megidramon and wished that he and Guilmon could start over. But as soon as Takato realized that he couldn't give up the old Guilmon, Megidramon quickly changed back into Guilmon. Takato then wished that he and Guilmon could fight Beelzemon together as it should be. This resulted in him Biomerging with Guilmon to become Gallantmon. After the battle, Takato then received a new D-Arc, an Ultimate (Golden) D-Arc. Takato was the only one in the season to get a Golden D-Arc.
- Megiddo Flame
- Dragon Howling
- Hell Howling (in X mode)