How do you find a metal coat in Pokemon platinum?

You can't find a Metal Coat in Pokémon Platinum directly. It's not available in the game. You can only obtain it in other Pokemon games, like:

* Pokémon Diamond and Pearl: Found in the Valley Windworks, a location only accessible after defeating the Elite Four and becoming the Champion.

* Pokémon Black and White: Found in the Relic Passage after defeating the Elite Four.

How to Get a Metal Coat in Pokémon Platinum:

1. Trading: The most common method is to trade with someone who has a Metal Coat from another Pokémon game.

2. GameShark/Action Replay: Using a cheating device like a GameShark or Action Replay allows you to create a Metal Coat in your game.

What is a Metal Coat used for?

A Metal Coat is a held item that allows a Pokémon to evolve through trade. It's most commonly used for:

* Onix to Steelix

* Scyther to Scizor

Remember that trading is the only legal and ethical way to obtain a Metal Coat in Pokémon Platinum without resorting to cheats.