How to Get Lots of Coins in 'Pokemon Crystal'by Paul Ramone ; Updated September 22, 2017
"Pokemon Crystal" is a video game available for the Nintendo Game Boy Color system in which players can capture, trade, train and fight Pokemon characters to complete missions. If you are strapped for cash and need a quick way to gain coins, you can use a basic cheat code to quickly pile up 300 coins at a time. Take advantage of the cheat to buy any items that you need immediately.
Travel to the Game Corner in Golden Rod City.
Walk up to the slot machines and press the "A" button to play. The slot machines are located on the back right side of the room on the second floor of the building.
Wait until you line up two "7"s, and then press and hold the "A" button. Hold the "A" button until a third "7" falls into place. Once it does, you will receive 300 coins. Repeat this process to quickly collect coins.