I think they would fight for a while then give up relializing that they are sucky in comparisson 2 Chuck Norris. Then they would team up and kill penguins for about 2 hours, then go 2 Chuck's house and barbecue them, then, Chuck would spring a SUPRISE ATTACK! and kill them both and take all the penguine BBQ for himself, then he would get full and throw the rest at Dakota Fanning. yeah...that would be awsome :D
if weapons isnt allowed godzilla wins, but if weapons is allowed it would be easy for the ninja, the only thing he has to do is to throw a coinin a bottle and make a bet with godzilla that he cant pick it up, and when he tries to pick it up, the ninja skrews on the top, and godzilla cant get the coin and commits suicide