Here is how to find and catch Magnemite, Magneton and Magnezone in the wild.

 

Heading to the Cobalt Coastlands

To find these three Pokémon you don’t have much choice, as you will need to enter a space-time distortion in the Cobalt Coastlands area. You can find all three separately. If you only find a Magnemite, it will evolve into Magneton starting at level 30, then into Magnezone with a Thunder Stone. 

 

Sprite 081 EB.pngSprite 081 chromatique EB.png

Magnemite                 Shiny Magnemite

Type:

 

Sprite 082 EB.pngSprite 082 chromatique EB.png

Magneton              Shiny Magneton

Type:

 

Sprite 462 EB.pngSprite 462 chromatique EB.png

Magnezone                       Shiny Magnezone

Type:

 

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Credits to Poképédia for the sprites. 

Screenshots: Pokémon France.