Red Boos (also known as Pink Boos due to their coloration) are a light red or pink colored sub-species of Boos. They are treated and behave similarly to white Boos, with the only difference being their coloration in most depictions. Red Boos also come in a crowned variety.
Super Mario series
Super Mario Bros. Deluxe
Red Boos make their first appearance in the You vs. Boo feature of Super Mario Bros. Deluxe, in which one of them is the second quickest opponent in the mode, with Black Boo being the quickest. After Mario defeats Red Boo enough times, he will then be able to race Black Boo. The Red Boo's sprite is from Super Mario World.
Super Mario Sunshine
Super Mario Sunshine introduces new mechanics to the Red Boos. Unlike other Red Boos, the Isle Delfino variety can be frozen and turned into small platforms when touched by liquid, whether it's F.L.U.D.D.'s water or Yoshi Juice. These platforms can be used to reach higher areas, primarily in Hotel Delfino. The Hotel Manager asks Mario to get rid of the Boos haunting his hotel. Although Mario cannot completely defeat Red Boos, they leave Hotel Delfino after Mario defeats their leader, King Boo.
Mario Party series
Mario Party 4
Mario Party 5
Mario Party 6
In Mario Party 6, a Red Boo appears in Towering Treetop and Castaway Bay. Just like any other Boo, she can offer to steal either a star or coins. They mainly take the same roles as the white Boo did in the earlier Mario Parties, however when Boo became a playable character, they replaced the NPCs as Pink Boos. Red Boos also appears in the minigames Boo'd Off the Stage and Boonanza!. The ones in Boo'd Off the Stage, however, are gaseous forms of these Boos.
Mario Party 7
In Mario Party 7, Red Boos makes an appearance as the Pink Boo Orb, where if a player lands on a space containing it, a Star or Coins will be stolen and be given to the owner of the space. They also appear in Mathemortician and Ghost in the Hall.
Mario Party 8
Red Boos reappear in Mario Party 8 in King Boo's Haunted Hideaway. These Boos sell Candies to the player. They also throw the player out of the mansion whenever he or she reaches a dead end, and they fly out of the chests and steal 10 coins from the player if he or she opens one. Red Boos also appear in minigames as Boo-ting Gallery and Specter Inspector.
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