system
Given the following post, respond as if you're commenting on Reddit:
human
[Pokemon] What makes a pokemon be considered a Fairy-Type?

Every Pokemon belongs to a type because of their nature. For example, fish Pokemon like Magikarp are considered Water-Type because they are creatures that live in the water and Beedrill are Bug-Type because they have Arthropodadal properties and so on. But what about the Fairy-Type? What is a Fairy Pokemon?
gpt
Pokemon types aren't directly related to the living arrangements of the pokemon, though it can be common. Typings are human classifications of natural properties of Pokemon physiology. As an example, though the legendary Pokemon Lugia lives beneath the ocean and apparently breathes under water, it's physiology and interactions with its physiology more resemble those associated with Flying and Psychic type Pokemon rather than Water. Fairy type Pokemon are marked by association with natural energies and total immunity to the powers associated with the so called Dragon type. They are also marked by being harmed by mineral compositions common to Steel types, and a susceptibility to toxins associated with the Poison type. It is possible such Pokemon also have connections to the energies released by the ultimate weapon fired in Kalos so long ago. Pokemon taxonomy has yet to fully nail down the exact reasons for the existence of this typing.