identify this tv show - Teenager who warps into video games and has to defeat the boss of that level

Could it be Super-Human Samurai Cybersquad? From wikipedia:

As revealed in the first installment, "To Protect And Servo:" 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 is at the time 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.
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 presumed dead in the power surge)
visits Malcolm via computer screen. Kilokahn strikes a Faustian deal
with Malcolm and turns his digital monster into a Mega-Virus Monster
who is not only capable of corrupting electronics, but is also capable
of affecting the real world.

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 or Synchro (when he combined with Drago or Xenon,
respectively).