To get the Coin Case in Pokémon Emerald, follow these steps:
- Travel to Mauville City: You’ll find Mauville City after traversing Route 110.
- Locate the Yellow House: Find the yellow house next to the Poké Mart in Mauville City.
- Talk to the Lady Inside: Enter the yellow house and speak with the woman inside.
- Obtain Harbor Mail: Purchase a Harbor Mail from the Poké Mart in Slateport City, [according to YouTube].
- Trade for the Coin Case: Give the Harbor Mail to the woman in the yellow house in Mauville City, and she will give you the Coin Case in exchange.
With the Coin Case in your possession, you can now enjoy the games at the Mauville Game Corner and potentially win exciting prizes, including TMs for powerful moves like Ice Beam and Psychic.
Where to get a Coin Case in Mauville?
Get to Mauville City.
Find a yellow looking house on the left side of the Poké Mart.
Head inside and talk to the lady.
When the lady is finished talking, hand her over the Harbor Mail.
In return, the lady will give you the Coin Case.
Where is the lady with the Coin Case in Pokemon Emerald?
You need to give a Harbor Mail to the woman in the house next to the Poké Mart in Mauville City in order to receive the Coin Case. If you do not have one to trade with her, you’ll not be able to get the Coin Case.