Black Smoke Shenron

Black Smoke Shenron (黒煙の龍), also known as Aku Shenron or Evil Shenron, is an evil, eternal dragon in the Dragon Ball franchise. He makes his debut in the 47th episode of Dragon Ball GT, titled "The Greatest Surprise." Black Smoke Shenron is born from the accumulated negative energy caused by the overuse of the Dragon Balls. Unlike the well-mannered Shenron, Black Smoke Shenron is foul-mouthed, rude to those who summon him, and smokes cigars while blowing smoke at them. He refuses to grant wishes and instead releases the seven Shadow Dragons, who are the embodiment of the negative energy. Black Smoke Shenron serves as the overarching antagonist of the Shadow Dragons Saga in Dragon Ball GT. He also appears in Dragon Ball Heroes: Victory Mission where he creates a shadow version of Goku. His evil nature stems from the negative energy built up in the Dragon Balls, showcasing the potential dangers of over-reliance on the wish-granting orbs.