You've been sitting in the Celadon Game Corner for what feels like hours, watching your hard-earned Poke Dollars turn into a handful of coins, only to lose them all on a single pull of the slot machine. The Porygon, the TM for Flamethrower, and the Dratini all sit tantalizingly out of reach, locked behind a massive coin wall. Grinding for coins feels like a pointless chore designed to waste your time. What if you could bypass the grind entirely and get those rewards right now? There's a method, deeply embedded in the game's code, that lets you manipulate the slot machines for infinite coins. It's not a cheat code you enter; it's about understanding and exploiting the game's deterministic random number generator.
Unlike modern games with complex random algorithms, Pokemon Crystal's slot machines run on a predictable sequence. The game uses a Random Number Generator (RNG) that cycles through a pre-set list of numbers. Every action you take—walking a step, talking to an NPC, opening the menu—advances this RNG sequence by a specific number of "frames." Crucially, the slot machine outcome is determined by the RNG frame you're on when you press the button. This means if you can control which frame you're on, you can control the reel results. The "infinite coins" trick is all about finding a specific pattern in your game's RNG cycle that produces a high-payout result, and then repeating the exact steps to hit that same frame every single time.
The most famous and reliable pattern for this exploit is triggering a "7 7 7" or "7 BAR BAR" jackpot, which pays out 300 coins. To do this, you first need to find your game's current "seed." You do this by saving your game directly in front of a slot machine. Then, you play a few times, meticulously noting the exact symbols that appear on each reel for 5-10 spins. You then compare this sequence to known RNG charts available online from the Pokemon speedrunning community. By matching your sequence, you identify your current position in the RNG cycle. From there, you calculate how many frames you need to advance to land on a jackpot frame. The advance is done by performing low-impact actions like tapping the A button a specific number of times or taking a single step. Once you've triggered the jackpot once, you reset the game, reload your save, and repeat the exact same number of frame-advancing actions to hit the jackpot again. Rinse and repeat for infinite coins.
While the RNG manipulation is the classic method, a more direct glitch exists, often called the "Coin Case glitch" or "item duplication." This doesn't involve the slots at all. First, you need to have at least one Coin Case in your Key Items pocket. You then go to the Goldenrod Department Store rooftop and purchase as many Fresh Water, Soda Pop, or Lemonade drinks as you can; these are important because they have a resale value. You then perform a specific series of menu actions: opening your bag, scrolling to the Coin Case, selecting "Toss," and then at the precise moment, pressing the Start button to open the main menu and fly to a different city. If done correctly, the game glitches, and you can now sell a single Fresh Water for 9999 coins. This method is faster but carries a higher risk of corrupting your save file if done incorrectly, so creating a backup save state (on an emulator) is strongly advised.
Once the coins are flowing, the Celadon Game Corner becomes your personal trophy room. The big-ticket item is Porygon, costing a staggering 9999 coins. This rare Pokemon is otherwise unavailable without trading. Next, grab the TM for Flamethrower (4000 coins), one of the best Fire-type moves in the game. TM for Ice Beam (4000 coins) is equally essential for coverage. Don't forget TM for Thunderbolt (4000 coins) to complete your elemental trio. For Pokemon collectors, Dratini (2800 coins) offers a direct path to the powerful Dragonite. You can also buy Abra (180 coins) early on to quickly get an Alakazam, though it's easier to catch one in the wild. Finally, load up on PP Up items (1000 coins each) to maximize your best moves' staying power.
This exploit is specific to the original Game Boy Color releases of Pokemon Crystal (and to a similar extent, Gold and Silver). The Virtual Console re-releases on the Nintendo 3DS eShop use slightly different emulation, and the RNG manipulation methods often do not work consistently, as the emulator can affect timing. The 3DS versions may also have patched certain glitches like the Coin Case duplication method. If you're playing on original hardware or a faithful emulator like BGB or Gambatte with RNG recording enabled, the slot machine RNG manipulation is highly reliable. The duplication glitch is more universal but riskier. Remember, these are exploits of the original game's programming, not intended features.
Within the single-player context of Pokemon Crystal, using these exploits is a personal choice. It doesn't affect other players. The game's original coin grind is notoriously slow and tedious, with the slot odds heavily weighted against the player. Many in the community view these methods as "breaking the game's bad minigame" rather than cheating. However, if you use a glitched save to transfer Pokemon to later generations via the Time Capsule or Pokemon Stadium 2, there is a small chance a badly glitched Pokemon could cause issues. Pokemon obtained purely through RNG-manipulated coin purchases (like Porygon) are typically considered completely legitimate, as they were obtained through normal in-game means, just with foreknowledge of the RNG sequence.
The slot machine RNG manipulation is notoriously finicky and often unreliable on the 3DS Virtual Console version due to differences in emulation timing. The Coin Case item duplication glitch has a higher chance of working, but there are reports of it being patched or behaving differently. Your safest bet for these exploits is the original cartridge or a accurate emulator like Gambatte.
No. Pokemon Stadium 2 for the Nintendo 64 simply reads the data from your cartridge. It has no anti-cheat mechanism. Pokemon obtained with coins from this exploit are identical to those obtained through normal grinding, so Stadium 2 will treat them as completely legitimate. The game only checks for obviously illegal data (like a level 255 Bulbasaur).
The Coin Case item duplication glitch is significantly faster once you've set it up, granting 9999 coins in seconds. However, it requires specific items and carries a corruption risk. The slot machine RNG manipulation is slower per cycle (you have to reset and repeat the frame-advancing steps each time) but is generally considered safer and more reliable for your save file's long-term health.
No special items are needed for the slot machine method. You just need enough Poke Dollars to buy some initial coins (usually 100-500 is enough to start charting the RNG). For the Coin Case glitch, you absolutely need the Coin Case (obtained in Olivine City) and money to buy Fresh Waters in Goldenrod City.
Yes, extensively. Actively manipulating the RNG for coins directly alters the sequence for everything else. If you are also hunting for a shiny Pokemon via RNG manipulation, you must use a separate save file or completely recalibrate your RNG seed after your coin farming session, as your frame position will be wildly different.