Megas XLR

In the distant future, Earth is fighting a losing war against an alien race known as "the Glorft". In a last, desperate attempt to save the planet, the human resistance steals a prototype mecha robot from the Glorft and modifies it into a powerful war machine, renaming it MEGAS (Mechanized Earth Guard Attack System). The idea is to use a time-traveling device called a time drive to send MEGAS and its assigned pilot, Kiva Andru, two years into the past to the Battle of the Last Stand, which was the last major offensive fought by humanity against the Glorft. Humanity lost that battle, but the members of the resistance, particularly Kiva, believe that MEGAS can tip the scales and hand the Glorft a decisive defeat.