When Ness goes around his town in Onett, it turns out everyone isn't around except one being Porky Minch. This is an alternate universe where Giygas never attacked, and Ness along with Porky have a good relationship. Ness learns from Porky that today's the day of the annual Fourside Festival, and the two boys decide to go to the festival together. Ness wanting to go to figure out where everyone around town went, and Porky because he's craving some good food.. Probably Trout Yogurt. Along the way, all sorts of whacky stuff happens.