Ahhh! I've had this anime/show stuck in my head for the longest time! It was about a fat blonde dude and his friend who looks like a total badass with a leather jacket and beanie! They had this giant blue robot with flames and they would fight aliens and other villain robots! I believe that there was also a girl in the team if i'm not mistaken they used to give it in toonami in the mid 2000's if i remember correctly! I tried to google it but I never found it!