Is there a way to get leviathan if you didn't draw him from Norg? I've restarted my game several times but when I get to the galbadia missile base it won't let me in the the missile launcher room. I tried using the game shark code walk through walls but when I used that it made the missile you're supposed to help shove over be put in place and I can't get any farther. I tried downloading a a saved game file but I can't open it. It's a file extention that ends in .gme. I have a game saved from disc 2 in the Dicht's house.

You can draw him from Trauma in Ultimecia castle, but that's probably too late for him to be any use