Home / Authenticity guide
Cartridges & handhelds
Clues are not proof.
Print, shell, screw, board, and date-code details can help you decide what to ask next. None of these visual checks alone is definitive authentication.
Cartridge exterior
What to look at
Epilogue’s guide describes these as physical inspection steps and notes that software checks also are not a guarantee. Treat every visible feature as one clue among several.
Label & printCheck the label closely
- Look for print quality, spelling, color tone, and artwork that matches the specific release.
- Epilogue identifies a stamped two-digit label code as a Nintendo quality-control clue. The project’s game notes say this is not established there as a PCB/date stamp.
- Different regions and releases can vary; a label detail by itself does not authenticate a cartridge.
Back shell & screwLook for expected markings
- Epilogue says official Game Boy-family cartridge backs have Nintendo branding and/or “Made in Japan”; missing, incorrect, or unrelated wording can be a warning sign.
- The guide lists 3.8 mm screws for Game Boy/Game Boy Color cartridges and tri-wing screws for Game Boy Advance cartridges.
- Screws and shells can be replaced, so the expected screw type is a clue, not proof.
Board inspectionOnly open with permission and care
- If a qualified inspection is appropriate and the seller agrees, look for consistent Nintendo text/branding on the board and compare its layout with a known-good example of the same game and region.
- Epilogue lists misspelled Nintendo text, black-epoxy chip packages, stacked or oddly cut boards, internal stickers, and holes in pins among signs to investigate.
- Board layouts and regional variants are not independently authenticated by this guide. Do not treat one board feature as conclusive.
Reproduction partsAsk about repro shells and repairs
- Ask directly whether the shell, label, board, or other components are original or have been replaced.
- A reproduction shell or replacement label can make an item look different from its original configuration; appearance alone does not establish what is inside.
- Request clear photos and, where appropriate, a return option. Do not ask a seller to open a cartridge without permission.
Date-code caution: the two-digit stamp described by Epilogue is on the label and is presented as a quality-control mark—not as a general PCB date code. The game research notes say per-game PCB/date-code layouts and exact regional variants have not been independently verified. Treat date codes as clues only, not proof.
Handheld condition
Check the whole unit, not one label
A handheld can be repaired, reshelled, or modified. Ask for photos of the label/serial and the powered-on screen, and ask the seller to disclose non-original parts.
Label and serial
Ask for a sharp, unobstructed photo. Check that it is present and legible, then compare the model designation with the unit being sold. A label photo alone does not establish authenticity.
Shell, screen, and controls
Look for mismatched wear, altered openings, replacement lenses, or an unusual display, then ask what was changed. A modified system is not necessarily a bad purchase if the changes are disclosed and suit your needs.
Board and screws
Do not open a handheld without the owner’s permission and appropriate tools. If it has been opened, repairs or replacement parts may explain differences; use model-specific references and multiple clues.
References
Sources and limits
The linked guide informs the cartridge clues above; the local notes record which details this project has not yet confirmed.
These checks provide screening clues, not definitive authentication. For a high-value purchase, use a knowledgeable independent inspection and a clear return policy.