The Marble 5 (マーブル5人衆 Māburu 5 Ninshu?, lit. "5 Marble People") are Shogun McGuiness's elite minions. They are five men in bunny costumes, each one with a different color and name assigned: Blue Marble, Red Marble, Green Marble, Yellow Marble, and Black Marble. Each one of them was a scientist which McGuiness brainwashed by giving them candies.
They first appeared in Ganbare Goemon 2: Kiteretsu Shōgun Magginesu.
In this game, they help Shogun McGuiness invade Japan. Each one guards a different castle, where they await with either a new monster or robot in order to stop Goemon from reaching their master's flying fortress.