1950s 1960s 1970s 1980s 1990s 2000s 2010s alien amphibious arthropod avian biomechanical cgi china dinosaur godzilla heavyweight human humanoid hybrid japan lightheavyweight lightweight live mammal maneater marine mechanical middleweight mutant natural prehistoric prop reptile robot shapeshifter stopmotion subterranean suit super superheavyweight supernatural superscience tentacles transformers uk ultra usa water welterweight