You know the Godzilla series is seriously on the ropes when the King of the Monsters is reduced to a co-starring role in his own movie. Giving last week's Godzilla vs. Gigan a run for its money as worst Godzilla film, Godzilla vs Megalon was released in 1973 in which Godzilla plays second string to the first and last appearance of the robot Jet Jaguar.
