King Boo

King Boo is the main antagonist of the Luigi's Mansion series, and a frequent playable character in Super Mario series spin-offs. He teamed up with Phoenix Wright in Norendera's Low Quality Tournament.

Biography
After the events of the Luigi's Mansion series, King Boo ended up settling down in the PokePark's Haunted Zone. There he rest peacefully until Phoenix Wright mentioned his case to him. The two soon realized they were to be a team-up in Norendera's Low Quality Tournament, and was eager to participate.

King Boo has not been seen after the After Tourney Party.

Trivia

 * King Boo has technically appeared in a Juno Songs cover, but the King Boo depicted is an exaggeration by Luigi.
 * King Boo is Chiaki Sakura Rose's Mario Kart main.