Mario and Luigi, plumbers from Brooklyn, find themselves in an alternate universe where evolved dinosaurs live in hi-tech squalor. They're the only hope to save our universe from invasion by the dino dictator, Koopa.
A group of heavily armed hijackers board a luxury ocean liner in the South Pacific Ocean to loot it, only to do battle with a series of large-sized, tentacled, man-eating sea creatures who have taken over the ship first.