Stu is the third boss in the game Donkey Kong Country Returns and Donkey Kong Country Returns 3D. He is the boss of the Ruins area, appearing in the level Ruined Roost. Stu is just an egg before he is hypnotized by Gong Tiki. After being defeated by Donkey Kong and/or Diddy Kong, Stu's "armor" will further crack, causing him to fall down, and then fall apart exposing his torso, resulting in Donkey Kong and Diddy Kong comically placing their hands on their eyes to avoid looking at his body, yet peeking anyways.
Stu is a giant red bird with blue and yellow-tipped feathers and blue talons. He has a big yellow beak, blue eyes, and purple eyelids. Stu wears a golden crown with a jewel in its center. He has a bare pink torso that is covered with a golden cauldron filled with bombs (although the presence of red, white, and blue feathers when it breaks would imply that the bare torso was not natural as much as his feathers dislodging from the forceful destruction of his golden cauldron).