King MacFrights

King MacFrights is the sixth boss encountered in Luigi's Mansion 3. King MacFrights is encountered and fought on Floor 6 after Luigi locates him at Castle MacFrights. He then taunts Luigi with the elevator button to Floor 7, and challenges him to make it through his castle and reach him. Defeating King MacFrights rewards Luigi with the elevator button to the seventh floor.

Appearance
Luigi searches the jousting area when King MacFrights notices him on a balcony. Enraged at his presence, he then possesses a suit of armor attached to a steed, and then, upon showboating the "audience", charges at Luigi, forcing the latter to dodge.

Battle
The first phase of the battle has King MacFrights riding around the arena and then charging at the player, requiring a well-timed flash to stun him long enough to fire a plunger at him and then yank him around. This needs to be done three times to destroy his armor. During each successive portion, he will also order for fire arrows to be launched. Upon his armor being defeated, King MacFrights then is armed only with a sword and shield, and after doing a spinning charge, he'll drop the shield and struggle to pick it up, leaving him open to be flashed and result in him being sucked. Upon being defeated, he'll try to use his sword to prevent himself from being sucked in, only for him to cause his sword to spin in the air and get sucked in as he's reaching for it. The "audience" then boos at Luigi before vanishing with Luigi getting the seventh floor button.