Although technically a virtual, manmade Pokémon, Porygon-Z does have a physical body. Its head is fuchsia and ovoid in shape with a short, blunt antenna protruding upwards and a blue bill similar to that of a duck. Its eyes are yellow and have black rings, similar to a bulls-eye. The head is completely detached from the body and floats slightly above it. Its smooth, ovoid body is fuchsia with a blue ring connecting its arms. Two arms are loosely connected to its upper body and other than their blue color, have no features. The tail is also blue and featureless, but slightly resembles a paddle.
Porygon-Z was given additional software in order to increase its abilities. The initial idea was to give it the ability to travel through alien dimensions, but an error occurred. Instead, the Pokémon began acting erratically. Porygon-Z, and its pre-evolutions are the only known Pokémon that can learn Conversion and Conversion 2.