Magnezone is the result of Magneton levelling up in the presence of a special magnetic field that has only been discovered at Mt. Coronet and Chargestone Cave. The centre Magnemite of Magneton has grown bigger and more oval-shaped than the other two upon evolution. The middle Magnemite also has a red pupil in its eye instead of a black one and a yellow antenna on top of it. Magnezone as a whole is a darker colour grey than its pre-evolutions, surrounded by a thin, metal rim and two dark-gray horse-shoe magnets that are positioned to look like metal claws. There is also a third horse-shoe magnet on the back of the middle Magnemite that is positioned like a tail.

Unlike Magnemite and Magneton, Magnezone has been recognised as an Electric/Steel Pokémon ever since it was discovered. Even though Magnezone and its pre-evolutions are seemingly-mechanical creatures, they still have emotions, they need to eat, and they have some way of reproducing. Magnezone could possibly be related to Metagross, who is also a half Steel-type Pokémon that floats by using electromagnetic waves.