Where do you buy coins in Heart Gold?

You can buy coins in HeartGold at the Game Corner in Goldenrod City. The Game Corner is a casino-like building where you can play various slot machine-style games and exchange your winnings for coins.

Here's how it works:

1. Play the Games: You can choose from various games like "Slot Machine" and "Voltorb Flip".

2. Win Tokens: The more you win, the more tokens you earn.

3. Exchange Tokens for Coins: Head to the counter at the back of the Game Corner and exchange your tokens for coins.

Important Note:

- You need to have a Coin Case to store the coins. You can obtain this item from the lady at the back of the Game Corner after winning a certain number of tokens.

- Coins are used for purchasing items and playing some minigames within the Game Corner.

- While you can buy coins, it's generally more efficient to earn them by playing the games.