Heavy

 Heavy is a virus from Mega Man Battle Network 3. It moves up and down along its row on its side of the field. It will also float above its target, moving up and down along that row.

Heavy
 Heavy is a yellow variant.

Heavier
 Heavier is a red variant.

Heaviest
 Heaviest is a green variant.

HeavyΩ
 HeavyΩ is a blue variant.