Actually, X-Pac always been a tough wrestler and top Light-Heavyweight. As The Lightning Kid, he won the Pro Wrestling America Light-Heavyweight title in 1990 (from Matt Derringer) and 1991 (from Jerry Lynn). He also won the Global Wrestling Federation Junior-Heavyweight title twice (from Lynn & Chaz) before travelling to Japan.
The Kid made an unimpressive WWF debute in 1993, however, droping his first match to Louie Spicolli. He also lost to mid-carders like Mr. Hughes and Doink the Clown, yet pulled of the greatest upsets in WWF history when he pinned Razor Ramon (Scott Hall) on Raw.
The 1-2-3 Kid, as he was called after his win over Ramon, steadily climbed the WWF ranks untill he suffered a back injury against Marey Jannetty, with whom he would team to win the WWF Tag Team title from the Quebecers on January 10, 1994.
After the two men lost the belts back to The Quebecers a week later, Kid retured to singles action and feuded with Owen and Bret Hart. In the midst of his battles with the Harts, he found time to win the Tag Team belts again, this time with Bob Holly. They defeated Bam Bam Bigelow & Tatanka in a tournament final at the 1995 Royal Rumble, but lost the belts the next night to The Smokin' Gunns. Frustrated by his inconsistency, Kid eventually sought the managerial guidance of Ted DiBiase. Suddenly, everybody's favorite underdog was one of the WWF's most despised rulebreakers.
Yet DiBiase's influence proved ineffective, and once free from his WWF contract, he officially joined his friends Scott Hall and Kevin Nash in the nWo on September 16, 1996. With a new name, Syxx, and a new attitude he became the nWo's exclusive cruiserweight star and defeated Dean Malenko for the cruiserweight belt at SuperBrawl VII. But the cumulative effects of his high-risk wrestling style eventually took a toll on Syxx, and a neck injury sustained in October 1997 put him out indefinitely. With his chronic injurys, and the professional relationship between Eric Bischoff and both Nash and Hall deteriorating, Syxx became a sacrificial lamb and was fired from WCW in March 1998.
One night after Wrestlemania XIV, he was introduced on Raw as the newest member of DeGeneration X. He used the occasion to rip into Bischoff and WCW World champ Hollywood Hogan, claiming that Nash and Hall were being held hostage by WCW.
Since his return, X-Pac has been no less forgiving to his opponents. He has been feuding with Jeff Jarrett, whom he beat him in a hair vs. hair match at SummerSlam, but most of his energy has gone into an ongoing feud between DX and The Nation. X-Pac gave DX a very breif leg up on The Nation when he beat D-Lo Brown for the European title in Sacramento, Calafornia, on September 15.
Over the course of his eight-year career, X-Pac has gone from underdog to nWo-ite to WWF European champion.