- English: Jim Cummings (season one), John DiMaggio (season two and onwards)
- Japanese: Junichi Endō
Hak Foo, aka The Black Tiger, has spiked red hair, a thin moustache and chin beard, and habitually wears a blue muscle shirt and jeans. He wore a blue vest and red pantaloons in his first appearance, and when he joined the Dark Hand, had a costume change. He is a very skillful and brawny fighter, and a dangerous opponent to all who face him ... except for a minor hitch.Hak Foo has the habit of making up and shouting colorful metaphorical phrases whenever he commences an attack or a special action. One of his most commonly used catchphrases, for example, is "Angry crow takes flight!" whenever he makes a leaping attack with arms outstretched. On very rare occasion he changes tactics by shouting one phrase and executing a different move, but usually he prefers the most direct approach, which makes his tactics somewhat predictable. He even gives animal themed metaphors to non-combat things, for example, when waking up he yells "slumbering bear greets the dawn!" and when running away from something he says "bunny flees from vicious jackals". Even though his attack style is predictable, it is also adaptable, depending on the situation a new attack can be made at a moment's notice. For example, when fighting Jackie in space in the episode Shanghai Moon, he started to yell "Tiger lashes-," but ended up saying "through pudding?" when he moved far too slowly. It is possible that his apearance is reference/spoof of "Super Gogeta" From "Dragon Ball Z". Which would explain why he names his attacks,like in "Dragon Ball Z".
As a person, Hak Foo demonstrates a big ego, short-tempered and overconfidence to match; thus he is very condescending to minors and eager to pick any chance for a fight. But on one occasion in Season 2, where Jade had gotten hold of a demon archive and the Shadowkhan appeared, he was surprised when they turned on him and instead defended Jade (and kicking Hak Foo's butt in the process).
Because of his abilities and mannerisms, he often either impresses or intimidates others, and is shown to be much more capable than Finn, Chow and Ratso during their duties.
However, the Enforcers are not afraid to mock him when things do not go his way, such as when he is first defeated as a Dark Chi Warrior, or when Chow first encounters his tiny Shadowkhan minions in series 4.
Hak Foo first appears in the season 1 episode "The Dog and Piggy Show" after Tohru has just failed another mission to secure Shendu's Dog Talisman and destroyed the magical device used to detect them in the process. In order to get the work done more efficiently, Valmont hires Hak Foo (who has been working as a freelancer then) to recover the Pig Talisman from Bavaria, with Tohru for supervision. Tohru quickly grows resentful of Hak Foo's role and his condescending manner, but acted along. During his first encounter with Jackie Chan, Hak Foo manages to get the better of him, but he is subsequently trashed by Uncle, who was in possession of the Dog Talisman. He manages to defeat Uncle in the end, but re-encounters him again as both groups close in on the Pig Talisman. Hak Foo is the first to discover the Pig's power (namely firing fire-blasts from his eyes) and uses it in a technique he dubs "Heat Beam Eye-blast". Unfortunately, the power of heat beam eyes led to his defeat, as he and Tohru get literally crashed down, while the Chans escaped with the talisman.
In season 2 (after Shendu's first defeat), Valmont hires Hak Foo on a permanent basis as a lieutenant and field leader to the Enforcers following Tohru's defection. He continued to work for Valmont when he is possessed by Shendu's spirit. But after the eighth door was sealed, Hak Foo leaves and becomes a freelancer again.
In the season 2 episode Shrink Rap, he encounters the Chans again when he tries to steal the Armlets of Shiva, which make him grow two additional arms. In an attempt to get rid of him, Jade tries a Disappearing Spell on him, but accidentally shrinks both Hak Foo and Jackie instead, due to improperly casting the spell. Both Jackie and Hak Foo end up at the size of an ant and a melee right in Tohru's ear canal. Luckily both combatants
are expelled before the spell is reversed, and after returning to normal size, Hak Foo tries to attack Jade this time - only for her to shrink him once more and traps him inside a jar.
In season 3, Hak Foo is transformed a Dark Chi Warrior by Daolon Wong when Finn, Ratso and Chow have proven themselves too incompetent once more, and is the only of the Enforcers completely comfortable with the change. He spends only two episodes in the Season. As a Dark chi warrior his already formidable powers are increased to massive levels. He become strong enough to cause craters and earthquakes and can leap so high he vanishes from view, and is so durable Tohru drops a huge rock on top of him, and it breaks over his head harmlessly. He was only defeated by uncle using the super strength of the ox talisman
In season 4, Hak Foo helped Tarakudo to recover the Oni Masks with the other Enforcers. There was a running joke in the season where Hak Foo wanted to possess a mask, but it always landed on someone else's face. When he finally obtained a mask, he summoned the mini khan, to his frustration. They later proved to be deadly as they could eat shadows, which would permenantly render the victim unconcious (unless the mask was removed), as well as cause them to grow much larger. After losing the mask, he continues to work for Tarukudo.
In season 5, Hak Foo made his last appearance and helped the J-Team and the other Enforcers in the final battle against Drago. At that point, he was broke from never receving payment from the evil forces he worked for and needed some kind of money. As he stated, "Hungry Gopher Digs Hole". At the end of the episode, it seems that he and the other Enforcers have switched to the good side.