Boo (King Boo)

King Boo, also known as King Teresa, is a major antagonist in the Luigi's Mansion series and Luigi's arch-nemesis, as well as the leader of the Boos. He first appeared as the final boss in Luigi's Mansion, characterized by being larger than normal Boos and wearing a crown. King Boo often allies with Bowser and has frequently kidnapped Mario in various games, prompting Luigi to rescue him. His primary abilities include materializing and disappearing objects, and fire-based attacks. In the Luigi's Mansion series, King Boo typically appears as a ghost, whereas in games like Mario Kart, he is often a playable character with a different design. He also serves as a significant antagonist in the Super Mario series, frequently causing trouble with his ghostly powers. King Boo's appearance and abilities vary slightly across different games, but his role as a powerful and cunning ghost leader remains consistent.