GravityMan.EXE

One of the Darkloids spawned from darkness under ShadeMan, GravityMan fights against MegaMan and his friends as he tries to tear down the world to make it a place solely for Darkloids.

GravityMan.EXE was revived as an Asteroid Navi by Duo and given by Slur to two brothers named Mac and Harry. His abilities are used in various pranks against Rin Manabe.

(Source: Mega Man Knowledge Base)