Splatter Up! is an episode in the fanon SM64 bloopers series.
When the gang gets sucked into Coco's Splatoon game, they have to find their way out while avoiding becoming food for the Octarians. They also make some unlikely friends along the way.
Coco watches her game very closely in order to find out the winner. When she learns her team won, she cheers, and does a victory dance.