How to check a Pokémon cartridge

Use the exact game and region as your reference, then compare the label, shell, visible board, battery layout, and game behavior. These are screening clues—not a guarantee of authenticity.

Start with several checks

Game Boy cartridges have regional and board revisions. A replacement shell, worn label, or repaired board can also change one clue without settling the question. Ask for clear front-and-back photos and compare the same title, region, and cartridge type.

1. Label and region

Match the label to the exact title and region; label art often differs from box art, so a box-art crop is not the expected standard.
Game Verifying notes that Generation II Pokémon labels should have a metallic, foil-like effect rather than a smooth glossy look. Generation III labels should have a gem-like metallic effect.
Low-resolution or home-printed labels and an incorrect printed code are warning signs. A number stamp alone is not proof, and region-specific label designs vary.

2. Shell and screw

Check molding, seams, translucency, color, and the fastener against a known genuine example of the same title and region. Pokémon Crystal has a translucent blue/glittery Western shell; GBA Pokémon shells differ across titles.
For GBA, the “GAME BOY ADVANCE” molding should be shallow; unusually deep molding is a warning clue, not a stand-alone verdict.
Ask for a clear photo of the screw and shell seams. If the fastener looks damaged, mismatched, or replaced, ask whether the cartridge was opened; treat that as condition/history information, not an authenticity verdict. Do not open a seller’s cartridge without permission and the correct tool.

3. Board markings

If the board is visible—or opened with permission—compare its layout and markings with a title- and revision-matched reference. Contacts should look regular, but board variants exist.
A Nintendo logo or serial style on a board is not decisive by itself; counterfeit boards can imitate markings. A PCB copyright/date mark identifies the board design date, not necessarily the game’s release date.
Do not use “golden rectangles” as a pass/fail test. Their appearance varies, counterfeits can copy them, and Game Verifying documents rare genuine Ruby/Sapphire/Emerald boards that omit them.

4. Battery and save behavior

Battery layouts vary across Game Boy Color boards; some use a battery, some do not, and holders/orientation differ. Compare the exact cartridge rather than assuming one layout fits all.
On translucent Ruby, Sapphire, and Emerald carts, compare the visible battery and terminal orientation with a trusted reference. FireRed and LeafGreen should have no battery, although the shell still has molded battery-terminal space.
Boot the game, try an ordinary save, power off, then load the save again. For Ruby/Sapphire/Emerald, check clock-related behavior separately. Treat a failure as a reason to investigate function and battery/board condition—not as proof of a counterfeit by itself.

Bottom line: combine independent clues and compare the correct regional/revision variant. If a high-value purchase is uncertain, ask for better photos, an independent inspection, and a return option. Do not damage a label or open a cart just to force a verdict.

Pokémon Game Boy game guides

Each guide has a local-data-only value note. The current local catalog contains no per-game sold or asking-price snapshots, so those pages do not invent dollar ranges.

Sources and limits

The hardware-specific cues above are adapted from these guides, checked November 2, 2026. They describe screening methods and known variations; none makes one visible mark a universal authenticity test.

Game Verifying — Nintendo Game Boy Color: Pokémon label, shell, board, battery, and golden-rectangle variations.
Game Verifying — Nintendo Game Boy Advance: GBA molding, label, board-date, battery, and Pokémon-specific notes.

Use this as a buyer’s checklist, not a certification. A dead battery, worn label, repaired shell, or one unusual board revision can complicate an otherwise genuine cart.