You know what happens one Saturday practically every month? The Bug Off. If you're not preparing for it weeks in advance, then something is absolutely wrong. All Nat wants is one good, succulent, delectable, prime specimen. You don't have to catch a specific species. Any bug will do. So smart people will be at the island a week or two before, catching and hoarding Goliath Beetles, Agrias Butterflies, and maybe even a Horned Atlas. Stock up on about 10 Goliaths and 5 Agrias or Atlas, and you'll be set. Just don't waste any Golden Stags or Rainbow Stags on him. Nat doesn't appreciate those little Bell factories.