As his name suggests, Galleom 2.0 is an upgraded version of Galleom. He is virtually identical to Galleom except with 2 major differences. 2.0 has tank treads instead of legs and his left hand has been replaced by a buzz saw.
2.0 will use attacks similar to that of his predecessor except for Galleom's stomping action. Which has been replaced by a swipe with his buzz saw-hand.
I'm no artist, so if you want to, you can create an image of this boss from the description above and post it on here.