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, though it did not work as planned. Instead, the Pokémon began acting erratically. This has been attributed to the incompetence of the engineer who faultily updated its programming. Porygon-Z and its pre-evolutions are the only known Pokémon that can learn Conversion and Conversion 2.
NA:Porygon is an artificial Pokémon created by humans. Given an Up-Grade, it becomes Porygon2. Then another mod turns it into Porygon-Z. You'd think two upgrades would make Porygon-Z the perfect Pokémon, but actually, the Dubious Disc used to make Porygon2 evolve seems to have introduced some bugs. Maybe a patch is in the works?
PAL:Porygon is an artificial Pokémon created by humans. Given an Up-Grade, it becomes Porygon2. Then another mod turns it into Porygon-Z. You'd think two upgrades would make Porygon-Z the perfect Pokémon, but actually, the Dubious Disc used to make Porygon2 evolve makes it a bit glitchy. Maybe there's a patch in the works...
This Pokémon was unavailable prior to Generation IV.
Like Porygon and Porygon2, it is based on a bird made with 3D computer graphics. Its appearance with respect to Porygon2, as well as its unprogrammed behaviors, suggest that it may be based on the concept of a computer virus having infected Porygon2, or maybe a reference to copyrighted software usually being patched by users to use all the features, but often causing bugs in the program.
Porygon-Z is a combination of polygon and Z, with Porygon being a corruption on polygon. Z may refer to the Z axis in 3D coordination systems or that Porygon-Z is the last of its evolutionary line (since the letter Z is last in the Latin alphabet). Alternatively, Z may be a corruption of 2 (as in Porygon2).