Disgaea S01 E09 Galactic Battleship Gargantua

Their spaceship finally repaired, the Earth Defense Force challenges Laharl to rematch. Laharl accepts Gordon's challenge on the condition that he takes him to his castle. As Laharl prepares to begin his newfound Overlord rule, the Netherworld is invaded by Earth without Gordon's prior knowledge. Will Laharl be able to stop this invasion?