King Boom Boo

""What the...A ghost?""

- Knuckles's reaction upon encountering King Boom Boo King Boom Boo, also known as "The King Of Ghosts", 'is a minor villain in the video game Sonic Adventure 2 and in the anime Sonic X''. He is a giant ghost who rules all ghosts. He resides in the Death Chamber level, yet his presence is seen at the giant pillars of the Pumpkin Hill level and Aquatic Mines level, and like other ghosts in the Sonic universe, he is repelled by light.'''

Biography
Knuckles encounters King Boom Boo while searching for keys to a door Sonic, Tails, and Amy were trying to get through. In the boss battle, Knuckles runs around a circular arena while followed by King Boom Boo who throws blue fireballs at him (and may also attempt to bite him at close range). Occasionally the ghost stops to spew a huge blue wave of flames, and during that time Knuckles must stun King Boom Boo by activating an hourglass which opens panels in the ceiling, making light fill the room. After that you must chase his shadow across the room and dig it up, then run after him and punch him. He can be damaged up to three times in one hourglass flip. If you go too fast when running from him, he will come the other way round. King Boom Boo has not appeared in any game since Sonic Adventure 2.

Personality
King Boom Boo is malicious, sadistic and mischievous, laughing merrily when causing harm to others. However, he also has a cowardly side, as when the odds would turn against him during his battle with Knuckles, he would resort to running away. He also has a great aversion to sunlight and will try to hide from it. He appears incapable of coherent speech, only giving off babbles, grunts and roars.