Tonga ʻUliʻuli Fifita (born 10 February 1959) grew up on the main island of the South Pacific island-kingdom of Tonga, Fifita attended Tonga College, where he played rugby union. At the age of 15, he was part of a group of six teenagers and young men sent by the king of Tonga to Japan to study Sumo. Sione Vailahi, who would later become better known as pro-wrestler "The Barbarian", was also a part of this group. After moving to Japan in 1974, he competed under the shikona (sumo name) of Fukunoshima (福ノ島). He made his debut in November 1974 and reached the rank of Makushita 27. However, in 1975 the stablemaster who recruited him died, and he and the other five Tongan wrestlers got entangled in a dispute with his successor, which led to him being forced to retire by the Japan Sumo Association in 1976.

Under the guidance of two other former sumotori who had turned to puroresu, Genichiro Tenryu and Takashi Ishikawa, he joined their home promotion, All Japan Pro Wrestling. Early in his career, he also refereed matches in the Amarillo territory. Nevertheless, this merely served as a springboard for him to wrestle all over the world.

Meng made a cameo appearance in the 1978 Sylvester Stallone movie Paradise Alley along with many other professional wrestlers.

Tonga debuted at a WWF Championship taping on 8/20/85 as King Tonga and wrestled as a "babyface".

In 1986 King Tonga became a star by body slamming Big John Studd on Championship Wrestling, though predictably Studd's manager Bobby "The Brain" Heenan did not pay him the US$15,000 he promised to anyone who could do so. He made a name for himself as Haku in the WWF as half of "The Islanders" with Tama. Originally a fan-favorite team, the Islanders had mixed success, though they did win a $50,000 tag team Battle Royal at Madison Square Garden in October 1986. They turned heel in 1987 during a match on the WWF Superstars of Wrestling with The Can-Am Connection (Tom Zenk and Rick Martel). Earlier in the show, Heenan had announced he would have a new tag team that night and everyone thought he was going to introduce a new team to the WWF. Instead he showed up at ringside during the match where it became known his "new" team was in fact the Islanders. A feud thus broke out between the Islanders and the Connection; when Zenk left the WWF, Martel and replacement partner Tito Santana, as Strike Force continued the war, with the Islanders challenging Strike Force for the WWF World Tag Team Championship after the latter team won the belts. The team also had a classic feud with The British Bulldogs (Davey Boy Smith and Dynamite Kid) that was started when the Islanders, along with Heenan, kidnapped the Bulldogs' mascot, a bulldog named Matilda. Their feud ended after a six-man tag team match at WrestleMania IV, where the Islanders and Heenan (wearing an attack dog outfit), defeated the Bulldogs and Koko B. Ware when Heenan pinned Koko.

In 1988, following King Harley Race's legitimate stomach injury sustained in a match against Hulk Hogan, Haku was given Race's crown and robe and was rechristened King Haku during a coronation ceremony. In one of his first big matches after becoming King Haku, he would face Hulk Hogan with Miss Elizabeth in Hogan's corner on Saturday Night's Main Event in October 1988. He challenged Randy Savage for the WWF World Heavyweight Championship on December 17 at The Spectrum but failed to win the title. However he would cement his position as king by successfully defending his crown against the returning Race in a match at the 1989 Royal Rumble at The Summit in Houston. He would later lose the crown to Hacksaw Jim Duggan who himself was crowned as "King Duggan".

Haku would later go on to form the tag team known as the Colossal Connection with André the Giant and win the WWF Tag Team Championship from Demolition on 30 December edition of Superstars (taped on 13 December). Haku and André lost the titles at WrestleMania VI, when Demolition defeated the Colossal Connection to regain the titles. Haku never legally tagged Andre into the match (due to André's poor health). Late in the match André attempted to interfere, but Haku accidentally struck him with a savate kick which left André tied in the ropes; Haku was pinned shortly after this. The team's manager, Bobby Heenan, blamed André for the loss and even slapped the Giant, who retaliated by "paint-brushing" Heenan. Haku tried to ambush André; however, The Giant blocked Haku's kick and struck him repeatedly before leaving the ring alone to a standing ovation. André's face turn meant that the team had split.

In early 1991 he formed a tag team shortly after this with fellow Heenan Family member The Barbarian. Their most notable match was a defeat in the opening match of WrestleMania VII against The Rockers (Shawn Michaels and Marty Jannetty). The team was short lived and Haku returned to singles competition, facing the newly returned Ricky Steamboat on house shows the spring of 1991. In the summer of 1991 Haku began to appear in Super World Sports in Japan for joint WWF/SWS cards. Shortly after competing in the Royal Rumble in 1992, Haku left the WWF to compete exclusively in SWS.

Fifita joined WCW in 1994, under the new ring name Meng, because the name Haku was trademarked by the WWF. Fifita made his surprise WCW debut on the May 28, 1994 episode of Saturday Night, as the mysterious and intimidating bodyguard of Col. Robert Parker, wearing business suits and shades while maintaining a quiet demeanor. He would accompany Parker whenever Parker's wrestlers of the Stud Stable competed in matches. His last night as a bodyguard was at the SuperBrawl V pay-per-view event on February 19, 1995, where Stud Stable member Bunkhouse Buck lost to Jim Duggan. Meng attacked Duggan after the match. Later in the event, when Blacktop Bully was scheduled to wrestle Dustin Rhodes, WCW Commissioner Nick Bockwinkel came out and escorted Meng back to the dressing room because of the attack on Duggan earlier in the show. The next week, Col. Parker announced that Meng would no longer be a bodyguard, but would be a wrestler from then onwards, winning his first match against a local competitor with one fast high kick. Meng began feuding with Duggan, leading to a martial arts match between the two at Uncensored, which Meng won.

He would soon become known as "The Monster" Meng. He was touted as being a former bodyguard to the Emperor of Japan. Meng's finishing maneuver was the Tongan Death Grip, a nerve grip on the Adam's apple applied to a standing victim who would drop into a supine position.

Meng joined the Dungeon of Doom faction under the name "Face of Terror" to feud with Hulk Hogan. At Fall Brawl, Meng teamed with Dungeon of Doom members Kamala, The Shark and Zodiac to take on Hogan, Randy Savage, Sting and Lex Luger in a WarGames match, which Dungeon of Doom lost. The faction continued to feud with Hogan and his allies throughout the next few months. In November, Meng participated in the first-ever three-ring, sixty-man World War 3 battle royal at the namesake event for the vacant WCW World Heavyweight Championship. Savage won the match.

Two nights later, on the January 29 episode of Monday Nitro, Meng formed a tag team with Dungeon's newest recruit The Barbarian called The Faces of Fear, and the group was managed by Jimmy Hart. Faces of Fear lost to Road Warriors (Hawk and Animal) in the match. At Uncensored, Dungeon of Doom lost to Hulk Hogan and Randy Savage in a Doomsday Cage match. At Slamboree, Meng was randomly paired with Dungeon teammate Hugh Morrus against tag team partner Barbarian and Diamond Dallas Page in the Lethal Lottery tournament to qualify for the Battlebowl battle royal. Meng and Morrus lost the match.

Meng finally won the title at the Sin pay-per-view on 14 January 2001. He became the final WCW Hardcore Champion. A week later, he left WCW just weeks before it was bought by WWF in March 2001.

One week after Sin, Fifita returned to the WWF as Haku and made a surprise appearance at the 2001 Royal Rumble. After the Rumble, he formed a tag team with Rikishi, but the team did not last long due to Rikishi suffering an injury. Haku was left to wrestle on the lower card shows like Sunday Night Heat. His final TV taping was against Shawn Stasiak on a WWF Jakked/Metal taping in Buffalo, New York on 23 July 2001 which Stasiak won. Haku would work in WWF's developmental territory Heartland Wrestling Association. Haku's last matches were against WWF European Champion Diamond Dallas Page at house shows in February and March 2002. He was eventually released from the WWF in April 2002.

Many former wrestling personalities have described Haku as the toughest or greatest legitimate fighter in wrestling.

On 3 March 1989, Haku got into an altercation with some men at a Baltimore Airport bar who called wrestling "fake", and during the fight, Haku bit off the nose of one of the men. Haku stated, "Yeah. It was in Baltimore Airport...me and Siva Afi went over and there were lots of babyfaces there at the bar. So we went and sat in the other corner away from them. When they were ready to close, we had a few drinks, and on our way out there were five guys just sitting there. Of course, the same thing came out. The 'fake' stuff. 'Hey, are you guys with those guys – wrestlers? The fake wrestlers on TV?' You know. I said, 'Yeah. I'll show you.' And I reached over without thinking – there are four other guys there (laughs) – grabbed his face, and bit his nose off. Then the fight started. Me and Siva kind of cleaned house there and left. I'll never forget it."

In a shoot interview Bobby Heenan talked extensively about Meng and referred to him as the toughest man he has ever met. The most extreme story he shared was in regards to a bar fight in which he claimed Meng "took his two fingers on his right hand, his index finger and trigger finger, and he reached into the guy's mouth and he broke off the guy's bottom teeth." Heenan said that if he had not been there and seen it himself, he would not believe it. Heenan was also close friends with Andre the Giant and claimed that the only two men in the world that Andre feared were Meng and Harley Race.

Wrestler Shane Douglas said in a shoot interview that one would be better off fighting the US Army than fighting Haku. He spoke about an incident when he witnessed several cops trying to hold Haku down and one of them struck Haku with a baton on his face while the others emptied their cans of mace on him but Haku did not sell it.

This skin was made for me by Yondee.