Amazon.com: Nintendo 3DS Game Card Case 24 - Blue : Video Games
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Amazon.com: Yo-Kai Watch Game Card Case 12 (Whisper) for Nintendo 3DS : Everything Else
Managed to find another Hori 24 card case (5 now and they're all full xD). This is specifically for DS cards, and the case is narrower, it feels so cool to hold! :
Amazon.com: HORI Nintendo 3DS XL Hard Pouch - Black : Video Games
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