Super smash bros ultimate Shadows of infection

The battle against Galeem and Darkon may have ended, but peace was short-lived. In the aftermath of their victory, the fighters unknowingly released a dormant evil. A mysterious virus is spreading, turning allies into monsters. As the infection grows, the fighters must navigate a collapsing world, uncover the origins of the virus, and face impossible choices. With every shadow hiding a potential threat, trust is fragile, and survival comes at a price. Can the infection be stopped before it consumes everything?