Sounds like Superhuman Samurai Syber Squad
High school student Sam Collins is the head of a band called Team Samurai. During a recording session, Sam is zapped by a power surge and disappears, only to reappear seconds later with a strange device attached to his wrist which, at the time, is unremovable. Later after his friends Amp, Sydney, and Tanker leave, one of his video game programs, dubbed Servo, is subject to a power surge and zaps Sam again just after he has remarked "Cool battle armor!" This time, the zap pulls him into the digital world and turns him into his creation. As Servo, he roams the digital world and fights monsters called Mega-Viruses.
Meanwhile, another student from Sam's school, named Malcolm Frink, is designing monsters on his home computer when Kilokahn, an escaped military artificial-intelligence program that was presumed destroyed in the power surge, visits Malcolm via his computer screen. Kilokahn strikes a Faustian deal with Malcolm and turns his digital monster into a Mega-Virus monster. These Mega-Viruses are capable of attacking any device on the electrical grid (including the grid itself), Internet or telephone network, usually having real-life consequences far beyond what any standard computer virus would be capable of achieving.
Sam, now as Servo, must enter the digital world and stop Malcolm's and Kilokahn's Mega-Viruses. Sometimes, when Servo was unable to handle a virus by himself, he would call on the help of his friends using his Arsenal Programs. The Arsenal Programs could fight the viruses solo, transform, with the help of other Programs, and attach to Servo as armor. Since Team Samurai consisted of only 3 people at any one time, excluding Sam, only 3 vehicles were available at any one time. When Servo linked up with these Programs as armor, he changed his name to either Phormo when combined with Drago or Synchro when combined with Zenon, respectively).
Or maybe VR Troopers
The show focused on three teenagers in their late teens, Ryan Steele, Kaitlin Star, and J.B. Reese, living in the fictional West Coast town of Cross World City, California. They regularly attended and were teachers at "Tao's Dojo," a karate studio. Ryan was the most focused martial artist; J.B. was the computer wizard; while Kaitlin was a photographer & budding reporter for the local newspaper, the Underground Voice Daily. One day, Ryan's search for his long-missing father led him and his two friends to a strange laboratory. Inside, a digitized head of Professor Horatio Hart (who is a friend of Ryan's father Tyler) explained the truth about his life's work of having developed extremely advanced virtual reality technology in secret. "VR" is a dimension existing alongside our own; within it lie mutants bent on conquering both worlds. The main ruler of these is a creature known as Grimlord, who, unbeknownst to anyone on Earth, has a human identity as billionaire industrialist Karl Ziktor. As Karl Ziktor tries to overcome the barriers of the true reality to allow his armies easy passage from virtual world, the responsibility falls to Ryan, Kaitlin, and J.B. of defending the planet on both sides of the dimensional barrier. They have assistance in the form of armored bodies having incredible firepower. This included eventual additions to their arsenal, such as a Turbo Cycle, Techno Bazooka, VR Troopertron, VR Shoulder Cannon, VR Battlecruiser/Interceptop and a flying, laser-blasting Skybase.
Other regular characters on the show included Zeb as Jeb, Ryan's hound dog who after an accident in Professor Hart's lab, was now capable of human speech; Woody Stocker, Kaitlin's wacky hat-loving boss at the Underground Voice Daily; Percy Rooney, the local mayor's nephew and Kaitlin's bumbling rival reporter; and Tao, the wise martial arts sensei who owns the dojo and a family friend of the Steele Family. Recurring villains include General Ivar, Colonel Icebot, Decimator, the Skugs, and more throughout.
During the second season, the show changed format very slightly. Ryan's father Tyler was finally found and restored to normal. Then, he quickly left to help the government research further Virtual Reality based technology. With him came Ryan's new V.R. armor and an upgrade to his powers. Grimlord's base of operations switched from the virtual dungeon to a massive spacecraft, and added new Generals such as Oraclon, Despera, Doom Master and his Vixens. The Skugs now had the ability to become more powerful in the form of Ultra Skugs.