I keep on remembering a cartoon from the past but I can't remember the name, I can only remember these facts.
-Main concept is people in robots fighting in tournaments will millions watching them in a desert setting for most of it.
-Main character's name is Marcus Stephen Rover.
-Two teams called southern/northern vangaurd and northern/southern shadow dragons (can't remember which is which.)
-In shadow dragons team, there is a test tube guy and a samurai as some of the members.
-In the middle of it, 3 or 4 of the robots get an upgrade through a tube thing holding the robot.
-The commentator of the tournaments usually shouts, "THE WORLD IS WATCHING!"
-Has the graphics of action man and new captain scarlet.
If anybody knows the name, I will be in your debt.