Shin Godzilla Your Pet

Shin Godzilla is a creature that It is constantly mutating. Now we describe all its stages:
Stage 1: Looks like a tadpole without legs, has yellowish skin, and also has gills and bulging eyes. Height: 1.89 meters
Stage 2: resembles a lizard-like eel with bulging goases and gills. The front legs are not yet formed, it moves on its stomach with the help of its hind legs and helps itself with its tail for transmission Height: 2.36 meters
Stage 3: The skin is no longer yellowish as in the second and first stages, but already with shades of red and crimson. The front legs have finally formed, now he moves on his hind legs, helping himself with his tail. Height 3.48 meters
Stage 4: The skin is already black with gray tones, the tail is very long, it already stands on its strong hind legs, it is slow, but bites painfully, does not attack unless it is attacked. Height: 4.59 meters