How to Spot Fake Pokémon Game Boy and GBA Cartridges

Pokémon carts are among the most counterfeited retro games ever made, and the fakes have gotten better. A few years ago you could flip a GBA cart over, look for the four gold rectangles on the board, and call it a day. Counterfeiters caught on. Today the quick tricks that circulate on forums are often the exact features bootleggers copy first.

This guide is written for people who already know the basics and want a dependable process: what to check from a listing photo, what to check in hand, what to check with the cart open, and what to check on a ROM dump. No single tell proves a cart is genuine. Authentication is about how much evidence lines up, and how strong each piece is.

Why Pokémon Carts Get Faked So Often

Demand for the mainline Game Boy, Game Boy Color, and Game Boy Advance Pokémon games has never really stopped. That makes them easy to sell, and fakes cost very little to produce. Bootleg carts usually swap Nintendo’s mask ROM and save hardware for cheaper parts, so the game might boot and play fine for an hour, then lose your save, break the clock, or fail to trade. That’s why “tested and working” in a listing says nothing about authenticity.

Know What Genuine Save Hardware Looks Like, Generation by Generation

A lot of bad advice comes from mixing up how each generation saves. Get this right and many fakes give themselves away.

Generation 1 and 2: battery-backed SRAM

Red, Blue, Yellow, Gold, Silver, and Crystal save to static RAM, which only holds data while it has power. A coin cell soldered to the board keeps the save alive while the game is off. When that battery dies, the game still boots but won’t keep a save. In Gold, Silver, and Crystal, the same battery runs the real-time clock, so a dying cell can also cause clock errors. On genuine boards the battery type is printed near the cell. It varies by game and region, so check the marking before you buy a replacement instead of trusting a generic list.

Generation 3: flash saves, with a battery for the clock only

This is the generation that trips people up. Ruby, Sapphire, and Emerald save to flash memory, which doesn’t need power to hold data. Their coin cell (a CR1616 on documented genuine boards) runs only the real-time clock. When it dies, the game shows a message that the internal battery has run dry, and clock-based events like berry growth and tides stop working. Your save stays intact. FireRed and LeafGreen have no clock and no battery at all. They also save to flash.

So:

• A FireRed or LeafGreen cart with a battery inside is a fake.
• A Ruby, Sapphire, or Emerald cart that loses its save when the battery dies is behaving like a bootleg. Many fakes replace flash with battery-backed SRAM.
• A Ruby, Sapphire, or Emerald cart with no battery isn’t automatically fake. Batteries get removed. But you should look much more closely at it.

Checks You Can Do From Listing Photos

Good photos can rule a cart out. They rarely rule one in. Metallic label finishes and shallow molding are hard to capture on camera, so use this stage to filter.

Shell color and translucency

• Gen 1 (North American): Red, Blue, and Yellow came in colored shells that match the game. A grey or black shell on a Western Gen 1 Pokémon cart is a bootleg. Japanese releases differ. Pokémon Green was never released outside Japan, so an English-language “Green” is fake.
• Gen 2: Gold and Silver shells should be gold and silver with a glittery finish. Crystal should be translucent, glittery blue.
• Gen 3: Ruby, Sapphire, and Emerald are translucent. FireRed and LeafGreen are noticeably less translucent and can look nearly opaque in photos. The wrong color or the wrong amount of translucency is a red flag.

Label art and finish

• Cart labels are not cropped box art. Compare the label to a known-genuine copy of the same release, not to the box.
• Gen 2 and Gen 3 labels should have a metallic or gem-like foil effect, not a flat gloss.
• Low-resolution printing, fuzzy text, wrong fonts, or misspellings (for example, “Fire Red” split where it shouldn’t be) are strong signs of a fake.
• The product code printed on the label should match the game. Bootlegs sometimes print another game’s code.
• Don’t overweight ESRB logo style. Genuine Gen 1 carts were in print when the ESRB changed its artwork, so both old and new logos turn up on genuine copies. A rating letter that looks unusually thin is still worth a second look.

Checks to Do In Hand

Molding and branding

• Game Boy and Game Boy Color: The top grip should read “Nintendo GAME BOY™”. A shell that just says “GAME” is a guaranteed fake. Good fakes do get the text right, so check the lettering: Nintendo’s logotype is thick on the vertical strokes and thin on the horizontal ones. Lettering with uniform stroke weight, or letters that sit at different heights, is suspicious.
• Game Boy Advance: “GAME BOY ADVANCE” under the lip should be shallow. Bootleg molds tend to be too deep, especially the arrow near the bottom. The back should carry the Nintendo logotype, the cart model number (AGB-002 for standard carts), and “PAT. PEND. MADE IN JAPAN” with correct spacing.
• Fit: Some fakes are slightly oversized and feel tight going into the slot. Some have a small rectangular opening at the bottom that genuine shells don’t have.

The Gen 3 battery-terminal molding

This is one of the fastest checks on Gen 3 Pokémon games. Genuine shells have a rectangular area molded into the front half that lines up with the battery terminals. You can usually see its corners near the upper right of the label. It’s there on FireRed and LeafGreen too, even though they have no battery. On genuine Ruby, Sapphire, and Emerald, you should also be able to see the battery through the shell, sitting at a diagonal.

The visible board edge

Above the contacts you can see part of the PCB without opening anything. Genuine GBA boards normally show a Nintendo logo, sometimes in an oval and sometimes just the logotype, followed by a board code. Counterfeiters have answered this with near-miss silkscreens, letter swaps that read as “Nintendo” at a glance. Look closely at the letters, not just the general shape.

Checks to Do With the Cart Open

Opening the cart is still the most reliable inspection. Game Boy and Game Boy Color carts use a 3.8mm security bit. GBA carts use a tri-wing (Y) screw.

• No epoxy blobs on Western releases. A black epoxy “glob top” in place of a packaged ROM is a classic bootleg sign. (Some legitimate releases from the Hong Kong and China regions reportedly used glob tops, but you won’t see that on a North American Pokémon cart.)
• Proper ROM packaging and markings. Genuine GBA ROM chips are commonly Macronix (marked “MX”) and carry the game’s code. A documented genuine Emerald, for example, has a ROM marked AGB-BPEE, a separate Macronix flash chip for saves, and a Seiko RTC chip next to the battery and crystal.
• Board code and Nintendo marking on the silkscreen, consistent with known genuine boards for that title. The copyright year on a genuine PCB is the year that board design was created, not the game’s release year. An “older” date on a later game is normal.
• Battery logic. Gen 1 and 2 should have a cell. Ruby, Sapphire, and Emerald should have a cell for the clock. FireRed and LeafGreen should have none.

Compare against documented genuine boards. The Game Boy Hardware Database catalogs real carts down to chip markings and board revisions.

“Tells” That Are No Longer Reliable

These still get repeated, but they won’t settle the question:

• The four gold rectangles on the back of the board. They’re actually a production date marker, and counterfeiters have copied them for years. Some genuine boards have fewer, white-printed versions, or none at all.
• Stamped numbers on the label. Most genuine carts have a small imprinted code on the label, but cheap die-stamp kits make it easy to add one to a fake. Some genuine carts never had one, and the impression can wear away. Its absence is a reason to look harder. Its presence proves nothing.
• Square dot on the “i” in Nintendo. Fakes with a square dot exist.
• “It boots on real hardware.” Bootlegs carry the boot logo data the console checks for, so booting proves nothing.
• Weight. Small weight differences can come from the battery, the board revision, or the shell. Treat a scale reading as weak evidence at best.

The Strongest Software Check: Dump the ROM

If you have a cart reader such as a GBxCart RW or a similar dumper, read the ROM and save data and compare the ROM hash against a verified good dump of that exact release. Bootlegs usually patch the game’s save code to work with cheaper memory, so a hash that doesn’t match a verified dump is a strong red flag. Dumping software will also report the save type. A Gen 3 Pokémon cart reporting SRAM instead of 1Mbit flash is acting like a bootleg.

Know the limits. A matching hash tells you the ROM data is unmodified. It doesn’t prove the label, shell, or board are original, since parts get swapped. Use the dump together with the physical checks.

Gameplay Behavior That Should Make You Suspicious

• A Ruby, Sapphire, or Emerald cart whose save disappears when the battery is removed or dies.
• Save corruption after normal use, or saves that only stick when you save twice.
• Trading or linking problems with other carts, or with GameCube titles on Gen 3.

A genuine cart with a failing battery or dirty contacts can act up too, so treat these as reasons to open or dump the cart.

Buying Retro Pokémon From Go Gamers

Purchases on gogamers.com, new or pre-owned, are covered by a 365-day warranty from the order date, and you can return any product within 30 days of the order date for a refund of the purchase price (shipping isn’t refunded). See our Shipping & Returns page for the full details, including how to report a problem.

Browse our Game Boy games, Game Boy Color games, and Game Boy Advance games. We ship anywhere in the U.S. If you have Pokémon carts to sell or trade, you can get an estimate on our trade-in page. Items must be authentic, and final offers are made after inspection.

FAQ

Does a Pokémon FireRed or LeafGreen cartridge have a battery?

No. Genuine FireRed and LeafGreen carts have no internal battery because they have no real-time clock. They save to flash memory. If you find a battery inside one, it’s a bootleg.

Will a dead battery erase my Pokémon Emerald save?

Not on a genuine cart. Ruby, Sapphire, and Emerald save to flash, and the battery only runs the clock. A dead battery stops time-based events, but the save stays. Gen 1 and Gen 2 carts are different: their saves depend on the battery.

Are the gold rectangles on the back of a GBA board proof it’s real?

No. They’re a production date marker, and counterfeiters have reproduced them for years. Some genuine boards don’t have all four. Treat them as one minor data point.

Is a stamped number on the label a sign of a genuine cart?

It’s common on genuine carts but easy to fake with a cheap die-stamp kit, and some genuine carts never had one. A missing stamp is a reason to inspect more closely. A present stamp proves nothing.

What tools do I need to open Game Boy and GBA cartridges?

A 3.8mm security bit for Game Boy and Game Boy Color carts, and a tri-wing (Y) driver for Game Boy Advance carts.