Godzilla vs. Gigan

Released in Japan in 1972, American audiences didn't get to see Godzilla vs. Gigan until August 1977. Giant cockroaches have come to Earth and have taken over human bodies. Of course, they need Godzilla out of the way so they summon Gigan to get rid of the pesky monster.  Unfortunately, G-Man had to face King Ghidorah as well, but Anguirus (sometimes foe) comes to his aid.  The Godzilla Tower is destroyed and the bug creatures as well.

Check out Anguirus' unique fighting style:  http://youtu.be/-GxHA94_BMs