MetalGreymon has acquired a mighty power by mechanizing its upper body, and has updated its right arm with further mechanization. With the accumulation of fierce battles it survived, it has converted its right arm into a massive energy cannon called Alterous in order to deal with the powerful foes to come. MetalGreymon: Alterous Mode uses its special move Positron Blaster to concentrate energy into Alterous and shoot cannon fire at sublight speed, or Alter Blade to cut with a positron blade of accumulated energy. It demonstrates perfect combat ability at both short and long range, having redesigned itself into a new form that defeats any tough foes it encounters.