The undersea nation of Seatopia sends the gigantic Megalon to destroy the world above - and it's up to Godzilla and a size-shifting robot, Jet Jaguar, to defeat him. Katsuhiko Sasaki,Hiroyuki Kawase,Yutaka Hayashi,Robert Dunham,Kôtarô Tomita,Ulf Ôtsuki,Gentaro Nakajima,Sakyo Mikami,Fumiyo Ikeda,Kanta Mori,Shinji Takagi,Hideto Odachi,Tsugutoshi Komada,Kenpachirô Satsuma,Rolf Jessup,Eisuke Nakanishi,Chris Hilton,Haruo Nakajima,Warren Rooke,Ted Thomas