There are several evolution items that you will need to use to evolve specific Pokémon in Pokémon Brilliant Diamond and Shining Pearl. Without these items, a Pokémon may never reach its final evolution. For those searching for Metal Coat, there are a handful of locations you can find it. Here’s what you need to know about finding Metal Coat in Pokémon Brilliant Diamond and Shining Pearl.
A solid and guaranteed way to find Metal Coat is to capture it off of a Magnemite. You’ll be able to find Magnemite wandering around the Grand Underground. This Pokémon appears in the Grand Underground pretty commonly, so you can expect to find it before you reach the end of the game. It all comes down to your luck. Magnemite does not require Metal Coat, but you can use it on other Pokémon, such as an Onix or a Scyther to evolve them into their second forms.
Alternatively, you can also find a Metal Coat when you reach Iron Island. When you step off the boat on Iron Island, proceed inside the house to speak with Byron. You can also unlock it at the Battle Tower, but it costs Battle Points.