1. From the Battle Frontier:
* Battle Factory: You have a chance of receiving a Metal Coat as a reward after completing a certain number of battles in the Battle Factory. The more battles you win, the higher the chance of getting valuable items like the Metal Coat.
* Battle Tower: Similarly, you can obtain a Metal Coat by winning battles in the Battle Tower. The higher your ranking, the better the rewards you can receive, including the Metal Coat.
2. From a hidden location:
* Iron Island: Located to the north of Veilstone City, Iron Island has a small chance of having a Metal Coat hidden within its caves. You'll need to search through the caves and explore carefully.
Note: The Metal Coat is a rare item, so it might take some time and effort to find one. It's worth trying both methods to increase your chances of success!