Marvin the Martian

Marvin the Martian is one of the main antagonists of the Looney Tunes franchise, along with Yosemite Sam and Elmer Fudd created, much like Sam, out of the need to make a challenging foe for the ever-tricky rabbit known as Bugs Bunny.

Appearance
While Elmer Fudd was considered too dimwitted to be a threat, Wile E. Coyote was just a predator, Taz was overly ravenous, and Yosemite Sam was quickly becoming just as hopeless, the creators of Looney Tunes felt the time had come for Bugs Bunny to meet a new kind of villain altogether, a villain who is both very clever and who posed a true threat.

So the alien menace known as Marvin The Martian was born, being a more calculating and dangerous opponent than those that came before him he nevertheless found himself defeated in the end by Bugs Bunny - though due to his popularity he returned and has stayed on as one of the Looney Tunes' most popular villains, appearing in many cartoons and films as well as countless merchandise, Marvin has even been adopted as the mascot of a few NASA vehicles among other things.

Marvin is depicted as a strange humanoid dressed in a vaguely Roman-style suit with a pair of oversized sneakers, this designed was chosen due to Mars being the name of the Roman god of war and has served him well as it makes him stand out from the crowd as a distinctive villain. Chuck Jones, who directed most of his shorts, stated that he based Marvin's blank black face on black ants, which he found scary.

In the Movie

 * Marvin has appeared in Space Jam, but was not a villain, only a referee.
 * In Looney Tunes: Back In Action, he was back to being a villain, while serving Mr. Chairman of the ACMEcorporation (who is the main antagonist of the second film) and releasing various aliens like the Daleks in Area 52. He served as one of the five tertiary antagonists, the others being Yosemite Sam, Wile E. Coyote, Elmer Fudd, and Taz.
 * He also appeared as the true main antagonist of Looney Tunes: Rabbits Run who only appeared in the climax.

Duck Dodgers
He also appeared in the 2003 animated series Duck Dodgers as one of the chief antagonists, and under the name of the Martian Commander X-2, serving for the Martian Queen. He also serves as a rival to the power hungry Martian General Z-9, who once betrayed both him and the Queen in an attempt to rule both Mars and Earth under his iron fist.