Red Boo

Red Boos (also known as Pink Boos, because of their coloration) are a light red or pink colored sub-species of Boos, making their first appearance in Super Mario Bros. Deluxe. Red Boos are treated as generic Boos and they are no different from any normal Boos, with the exception of the pinkish color. Red Boos were possibly introduced to take over the roles of normal Boos, since Boo was a host and later a playable character in the Mario Party series. Red Boos also come in a crowned variety. In Mario Party 4, Red Boos are mainly featured on the board Boo's Haunted Bash. On that board, Red Boos can give a player a ride on the Mystery Train. In later Mario Party games, they served no role other than stealing coins or stars from other players or being featured in various mini-games, such as the Ghost in the Hall mini-game in Mario Party 7. In Mario Party 5, Red Boos appeared in Card Party. If someone unluckily found one, it would steal the finder's star and give it to someone else. In Mario Party 6, a Red Boo appears in Towering Treetop. Just like any other Boo, he can offer the player to steal either a star or coins.

Super Mario Sunshine introduced new mechanics to the Red Boos. Unlike other Red Boos, the Isle Delfino variety can be frozen and turned into small platforms (Platboos) 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 the Hotel Delfino after Mario defeats their leader, King Boo.

Red Boos reappear in Mario Party 8, in King Boo's Haunted Hideaway. These Boos sold Candies to the player. They also threw the player out of the mansion whenever they reached a dead end.