Dark Force
A member of the MPVP introduced by Fusion in Member OG 3: Subtitle Soon!. He was the embodiment of the dark forces of nature or some crazy crap, and appeared as a black weathercloud rather than having a physical form. He was in charge of the MPVP HQ on Uranus. In Member OG 3, he arrives at Dark Jim's fortress to threaten him for the MPVP, and dispatches Gargoylous to battle him.
Dark Force does not appear again until Member OG 6: VGF Moon, where he is the first enemy sent after the OGers when they arrived at the main MPVP Headquarters. Dark Force once again tried sitting the battle out by summoning Gargoylous, who even tried summoning his own chain of minions. But in the end Dark Force had to take on the OGers. Yami Yoshi destroys Dark Force by tossing a Dark Omelet at him while he is preparing a lightning bolt, causing an explosion that obliterates Dark Force.
Dark Force has also appeared in the first, non-canon Member OG 5, where he was sent after the OGers early in the story and tried killing them with his own version of flatulence. He was killed in a similar manner to his later death in Member OG 6, when Black Skull Dragoshi tosses a Molten Egg that ignites Dark Force's fumes and causes him to be incinerated.