Godzilla (2010 Marvel Animated Universe)

Godzilla is a giant monster from the Pacific Ocean  and an enemy of the Avengers. He appears in  Marvel's Godzilla: King of the Monsters.

Biography
Godzilla is a dinosaur that survived the extinction and gets mutated by nuclear radiation.

War against humanity
In 1954, a monster named Godzilla laid waste to Tokyo and has battle the J.S.D.F. ever since. In 1999, Godzilla reappear and attack Sendai when the J.S.D.F. manage to lured Godzilla to an iceberg island and buried him in the ice.

Trivia

 * This Godzilla does not get killed by the Oxygen Destroyer.