Godzilla
From The Big Bang Theory Wiki
Godzilla is a huge monster in the form of a giant lizard, hundreds of feet tall, which appears in a number of science fiction films, almost all of them Japanese.
In the tabletop version of the Battle of Gettysburg played by the boys in The Cheesecake Factory (much to the chagrin of the employees), Godzilla was represented by green condiment bottle and fought for the South. Godzilla was taken out by the Illinois Cavalry and Hulk.