Dusk Pustules

The Dusk Pustules is a fruit in Pikmin 3 that is actually a purple grape. each fruit is found in bunches of 20, and must be individually plucked by the Pikmin. There are three bunches in the game. The first one is in the Garden of Hope, the second one is in the Distant Tundra, and the last one is in the Twilight River.

Captain Brittany's Notes
"There's something very charming about all of these little beads packed full of juice. They make me feel like we'll never run out! The color reminds me of something... Oh! It's Auntie Bea's hair! She has such a rebellious streak..."

Trivia

 * Brittany's notes are the same on the American and European copies of the game.