Dynamite Kid

Billington was trained by former wrestler "Dr Death" Ted Betley after a meeting at his fathers work introduced the two. Dynamite Kid made his debut working in 1975 for Max Crabtree. Kid's first match filmed for TV was taped 30 June 1976 in Lincoln (and transmitted 30 October by which time another match against Pete Meredith had been filmed and screened) saw him lose by technical knockout to veteran heel "Strongman" Alan Dennison after injuring his throat on the top ring rope. However, Dennison was so impressed by the technical skill of his young opponent that he refused the win and consequently changed his ways and became a blue-eye and a friend of Kid.

During his early days, he won the British Lightweight title on 23 April 1977, and the Welterweight title on 25 January 1978. He was also instrumental in starting the career of then-Judo star Chris Adams while still competing in the UK, was scouted and moved to Calgary, Alberta, Canada in 1978.

Dynamite made a big impact in his matches for Stampede Wrestling with the increasingly popular Bruce Hart, and rookie Bret Hart. Despite differences between them due to comments Dynamite Kid made about Stu Hart in his autobiography, Bret still regards him as "pound-for-pound, the greatest wrestler who ever lived". Dynamite Kid began taking steroids in 1979 when Big Daddy Ritter, aka the Junkyard Dog, introduced Billington to the anabolic steroid Dianabol. Billington was also introduced to speed during his stay in Canada by Jake Roberts.

After doing big business in Canada, Dynamite was booked on his first tour of Japan, working for International Pro Wrestling from 19–25 July 1979. Stu Hart and Stampede Wrestling switched their business relationship from IPW to New Japan Pro-Wrestling shortly after Dynamite's first tour, and he wrestled for New Japan from 4 January 1980 to 2 August 1984. Perhaps the most memorable matches that came out of Dynamite's run in New Japan were from his now legendary feud against Tiger Mask; Tiger Mask's debut was against Dynamite, in which Tiger Mask shocked the wrestling world by gaining the victory over Dynamite. The two would compete against one another several more times in a feud that is often credited as putting Junior Heavyweight wrestling on the map, as well as setting the standard for future generations. Both the NWA and WWF Junior Heavyweight titles were vacated after Tiger Mask was injured by Dynamite Kid in a tag match on 1 April 1983. Dynamite and Kuniaki Kobayashi competed for the vacant titles, but no winner was decided. On 21 April 1983, Dynamite and Tiger Mask met for the vacant WWF Junior Heavyweight Championship, but no winner was decided after the match ended up as a draw three consecutive times.

On 7 February 1984, Billington captured the WWF Junior Heavyweight Championship by winning a tournament in New Japan Pro-Wrestling; although it was a WWF Title, it was primarily defended in Japan. He defeated Davey Boy Smith earlier in the tournament, and would go on to defeat The Cobra in the finals.

Dynamite Kid made his WWF television debut on 29 August 1984, where he and Bret Hart defeated Iron Mike Sharpe and Troy Alexander in a match eventually shown on 15 September 1984, on the Maple Leaf Garden broadcast. Billington would end up teaming with Davey Boy Smith as the British Bulldogs, while Bret would turn heel and team with Jim Neidhart as The Hart Foundation, and it led to matches between the two teams that usually ended in No-Contests. On 7 April 1986, accompanied by Captain Lou Albano and Ozzy Osbourne, the British Bulldogs won the WWF World tag team title from Greg Valentine and Brutus Beefcake at WrestleMania II.

Dynamite Kid would suffer a serious injury in a tag team match that took place in December 1986 in Hamilton, Ontario, Canada against Don Muraco and Bob Orton, Jr. and several wrestlers including Roddy Piper, Junkyard Dog and Billy Jack Haynes would substitute for him when tag title defenses were made. While recovering in the hospital from back surgery, Billington would later recount that Bret Hart showed up and stated that Vince McMahon had sent him to get Dynamite's tag belt; Billington refused. Shortly after checking himself out of the hospital (against doctors' orders), Billington met with McMahon, who requested that the Bulldogs drop the tag titles to the team of The Iron Sheik and Nikolai Volkoff; Billington refused, saying that he would only drop the belts to The Hart Foundation.

McMahon acquiesced and at a TV taping on 26 January 1987, The British Bulldogs wrestled a match to drop the titles to The Hart Foundation; the match would air on 7 February edition of WWF Superstars of Wrestling. The match itself was an odd sight, as Dynamite could barely walk due to back surgery. Dynamite was knocked out by Jimmy Hart's megaphone early in the match, avoiding him having to wrestle much in the match for story purposes. From that point forward, the Bulldogs would not be a top-tier team anymore, and while they would not become straight jobbers, they would mostly wrestle to double disqualifications, double countouts or time-limit draws against the top teams in the WWF.

After leaving the WWF, the Bulldogs returned to Stampede Wrestling to win the International Tag Team Titles. The Bulldogs also competed frequently in All-Japan Pro Wrestling where they were paid $20,000 each by Giant Baba, along with the liberty of choosing which tours they wanted to participate in. Upon returning to Stampede, the Bulldogs were involved in a feud with Karachi Vice over the Stampede International Tag Team Championship. However, by February 1989, Dynamite became involved in a brutal feud with Johnny Smith after Johnny interfered and attacked the Dynamite Kid, before cutting his hair. In May 1989, the Bulldogs split up in Stampede, but remained a team in AJPW. Over in Stampede, the Bulldogs feuded with each other, with Dynamite forming The British Bruisers with Johnny Smith and Davey Boy Smith teaming with a young Chris Benoit.

In 1990, Davey Boy Smith abruptly withdrew the Bulldogs from AJPW's annual World's Strongest Tag Determination League by returning to the WWF, and fabricating a story to the All-Japan office that Billington was in a serious car accident and was unable to compete. Back home in the UK, from 1991 onward, he would regularly appear for local promotions All Star Wrestling and Orig Williams' BWF where, due to his WWF success, he was a headline attraction this time around. Since Davey Boy Smith had trademarked the term "The British Bulldog" during the Bulldogs' previous run in WWF, he decided to return to the WWF as The British Bulldog, and would send people to the United Kingdom to warn the promoter every time a flyer was distributed promoting Dynamite Kid as a "British Bulldog".

Johnny Smith would end up taking Davey Boy Smith's spot in the World's Strongest Tag Determination League, and the duo (known as the British Bruisers) continued to compete in All Japan Pro Wrestling. The duo managed to capture the All Asia Tag Team Championship, but the partnership was short lived; the years of steroid abuse (including an incident in which he used horse steroids), working a high impact style, and cocaine usage caught up with Billington as he suddenly announced his retirement on 6 December 1991, immediately after the Bruisers defeated Johnny Ace and Sunny Beach at Nippon Budokan in Tokyo. He returned to Japan as a special guest with Lord James Blears on 28 February 1993, and claimed that he was going to send his 17-year-old brother to All Japan's Dojo, but it wasn't realized. He returned again for a tag team match with Johnny Smith on 28 July 1993, and was planning to promote an All-Japan show in his country in 1994, but it wasn't realised either.

In 1991, he was divorced from his first wife Michelle Smadu (the sister of Bret Hart's then-wife Julie), with whom Billington had one son and two daughters (Marek, Bronwyne and Amaris). Following the end of his marriage to Michelle, he moved from Canada back home to Golborne with his parents. There he married for a second time to a woman named Dot; with her he had three stepsons; John, Steven and Mark. Before his death Billington had two granddaughters, Maiami and Taya.

His final wrestling match took place on 10 October 1996, at a Michinoku Pro event called These Days. The match was promoted as a "Legends of High-Flying" six-man tag featuring Dynamite paired with Dos Caras and Kuniaki Kobayashi against The Great Sasuke, Mil Máscaras, and Tiger Mask. Dynamite's body had degenerated to the point where he was "practically skin and bones", as the bottom portion of his tights were very loose. In the end, Dynamite delivered his trademark tombstone piledriver on Great Sasuke, leading Dos Caras to powerbomb Sasuke for the pin. While at the airport to return home on the next day, Dynamite had a second seizure (the first one was in 1987) and was sent to the hospital immediately.

In 1997, after having a great deal of complications he was experiencing with walking due to the large number of back and leg injuries he suffered during his career, Billington lost the use of his left leg. Relying on a wheelchair for mobility, he was cared for by his second wife, Dot. Billington was told he would never be able to walk again. Harley Race, the inventor of the diving headbutt (a move Chris Benoit also used frequently), has stated that he regrets ever inventing the move, because it appears to cause spinal problems as well as concussions, and may have contributed to Billington's disability. In addition to his paralysis, Billington also suffered from heart problems. In November 2013, Billington reportedly suffered a stroke.

In February 2013, Highspots.com released a documentary named Dynamite Kid: A Matter of Pride on the Dynamite Kid.

In October 2014, Billington was presented with a lifetime achievement award at Gloucester Leisure Centre by Superstars of Wrestling UK.

In 2015, he was named in a lawsuit filed by WWE after the organization received a letter from him indicating that he intended to sue them for concussion-based injuries sustained during his affiliation with WWE. He was represented by attorney Konstantine Kyros, who is involved in several other lawsuits involving former WWE wrestlers. Billington's lawsuit was dismissed by US District Judge Vanessa Lynne Bryant in September 2018.

Billington is featured in the 2016 documentary Nine Legends.

Billington died on 5 December 2018, his 60th birthday. The exact cause of death remains unconfirmed, but the BBC report of his death placed it in the context of the above-mentioned health issues.