TV-Series
Description
The character known as Boo originel, also referred to as Pure Majin Boo or Kid Buu, represents the original and most untamed form of the magical being Majin Boo. This form is revealed late in the Dragon Ball Z Kai storyline to be the creature's true state, from which all other versions, such as the innocent fat Majin Boo, are derived. Created by the wizard Bibidi in time immemorial, this being was an uncontrollable entity and the absolute incarnation of evil and chaos. Millions of years before the main events of the series, Bibidi unleashed this original Boo to attack the Supreme Kais, the gods who maintained order in the universe. In this rampage, the original Boo killed two of the five Supreme Kais and absorbed two others, including the Southern Supreme Kai and, crucially, the Grand Supreme Kai. The absorption of the gentle and porty Grand Supreme Kai directly counteracted Boo's pure evil nature, resulting in the creation of the childlike and less dangerous fat Majin Boo that is first awakened on Earth. Sealed away by a terrified Bibidi, this original personality lay dormant within the fat Boo for five million years until specific events forced its re-emergence.

In terms of physical appearance, Boo originel is a stark departure from the large, rotund form of his fat counterpart. He is a small, child-sized humanoid with pink skin and a sleek, demonic build. His facial features are sharp and cruel, with a complete lack of hair or eyebrows, red eyes set in black sockets, a small head appendage, and pointed teeth. He wears the standard Majin attire of a white pants with a black and gold belt bearing the "M" symbol, along with wristbands.

The personality of Boo originel is its most defining and terrifying trait. Unlike the more manageable fat Boo, this form is pure, unfiltered malevolence. It acts without remorse, compassion, or any form of logical reasoning, driven by a primal and childish egoism. His behavior is highly unpredictable and sadistic; he delights in mocking his opponents, causing indiscriminate destruction, and shows no loyalty or obedience, not even to his creator, Bibidi, or his master, Babidi. He is a sociopathic force of nature who only seeks to fight and destroy for his own amusement.

In the story, Boo originel's role is that of the final antagonist in Dragon Ball Z Kai. He emerges on the Sacred World of the Kai after the fat Majin Boo becomes enraged and expels the evil within him. Once the absorbed good elements, including the Grand Supreme Kai, are removed from his body, Boo reverts to his original, pure form. Upon his return, his first act is to destroy the Earth itself, forcing the surviving heroes Goku and Vegeta to flee. As the final enemy, he represents a threat far greater than any faced before, as he is pure chaos with no inhibitions or weaknesses. His primary motivation is simple destruction, and his reign of terror only ends when Goku, with a restored body and a Spirit Bomb fueled by the energy of all Earth's people, obliterates him completely.

Key relationships define his existence. He was created by the wizard Bibidi but was always an uncontrollable weapon. His master after revival is Babidi, but he shows him no respect and ultimately kills him. The most significant relationship is with his absorbed victims. The absorbed Southern Supreme Kai gave him a muscular form, while the absorption of the gentle Grand Supreme Kai transformed him into the fat, childlike Boo, effectively suppressing his original personality for millennia. Later, this good part of him, the fat Boo, is separated and acts as an independent being who opposes his original self. After his final defeat, his soul is reincarnated by the dragon Shenron into a good human boy named Oob, who is later trained by Goku.

The character development of Boo originel is less about personal growth and more about the revelation of a being's true, static nature. He does not learn or change; he simply reverts to his original state of pure chaos. This makes him the final, ultimate challenge for the heroes, representing a force that cannot be reasoned with or reformed, only destroyed. His notable abilities are immense, far surpassing his other forms in raw, unadulterated power. He retains all the core Majin abilities, including instant regeneration from any injury, the ability to stretch his body, and the power to teleport by sensing energy. He is also able to create a planet-destroying energy sphere with ease. Unlike the fat Boo, this form is smaller, faster, and more relentless, with no trace of the pacifying influence that once made him manageable.