The Armored Nut is a small acorn that falls under the Xenoflora Series of Pikmin Treasures. It is found in the Wistful Wild inside a Creeping Chrysanthemum. To find it, go to the Wistful Wild and run with your pikmin towards the bridge where the Fiery Blowhog is. Walk past the two Orange Bulborbs and into the area where the Withering Blowhogs are. The one of the three Creeping Chrysanthemums that is nearest to the Hole of Heroes has the Armored Nut, which interestingly coincides with the original location of the dormant Red Onion at The Impact Site in Pikmin 1.