For all that Dark Force is a being of supreme might, able to enshroud the entire solar system of Algol in neverending despair and horror, there are a few things darkness simply cannot fight. He is aware of that, of course.
However, he wasn't aware that the Chaos Emeralds were among those. Avalon, taking advantage of his uncanny likelihood to Sonic, yanked them out from Knuckles and sent Dark Force into the depths of a random RPG chest with them. And that was match.
However, the hapless adventurers of Grandia 2 now have found a new reason to grind since Dark Force began felling the trigger-happy wayfarers, who have gotten soft from fighting monsters as incompetent as the ones dwelling in their world. Dark Force himself doesn't seem to mind.