Mr. Black is a character from the anime Monsuno: World Master. He is the son of Grandma Future and serves as the ringleader of the group known as the Underground. His distinctive name comes from the single black tooth he has in his mouth. Mr. Black is an adult male with short black hair and black eyes. His Monsuno partner is Spikelash.

In terms of personality, Mr. Black is portrayed as a seedy, shifty, and untrustworthy individual who frequently resorts to cheating and underhanded tactics. He has a creepster demeanor and does not hesitate to manipulate situations to his advantage. His behavior puts him at odds with the main protagonists of Team Core-Tech, who refuse to tolerate his schemes.

Mr. Black’s motivations are initially tied to his role as the leader of the Underground, likely acting in service of his mother’s plans. He appears as an antagonist who directly opposes Team Core-Tech, often engaging them in conflicts within underground settings. However, his character undergoes notable development later in the series. He is captured by the villainous Dr. Klipse and transformed into a human Monsuno test subject. Through the intervention of Dr. Jeredy Suno, Mr. Black is restored to his human form and subsequently joins Team Core-Tech, shifting from foe to ally. Near the conclusion of the second story arc, he takes over as the head of the S.T.O.R.M. organization, replacing Commander Charlemagne.

His key relationships include his mother, Grandma Future, and his former subordinates Righty and Lefty. After his redemption, he works alongside Team Core-Tech and becomes a part of the larger effort to oppose greater threats. In terms of abilities, Mr. Black commands Spikelash in battle, utilizing the creature’s powers in combat. No other special skills or personal combat abilities have been documented in the available information.