The best official way to play Pokémon Crystal because the save battery won't die and you can now transfer to a 3DS game for free, also restored Celebi and wireless battling :
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Nintendo 2DS - Konsole (Special Edition) inkl. Pokémon Mond (vorinstalliert) : Amazon.fr: Jeux vidéo
Nintendo 2DS : la 3DS, sans la 3D – Guide du Parent Galactique
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Pokémon 20th Anniversary Celebrations to Include 2DS Bundles, New 3DS Cover Plates and Mew in Japan | Nintendo Life
Nintendo 2DS - Konsole (Special Edition) inkl. Pokémon Mond (vorinstalliert) : Amazon.fr: Jeux vidéo
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Boîte console Nintendo 2DS Black and Blue Assemblage facile
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Here is my 2ds and feraligatr. what are some virtual console games I should try? : r/3DS
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Crystal clear for 2DS : r/PKMNCrystalClear
Nintendo 2DS FAQ - Everything You Need to Know
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Nintendo 2DS - Wikipedia
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Nintendo isn't done with handhelds -- meet the New Nintendo 2DS XL | Mashable
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Console virtuelle (Nintendo 3DS) — Wikipédia
How to Extract 3DS Virtual Console ROMs - 16 Bit Guide - video Dailymotion
There's Only One Reason to Own Nintendo's New 2DS XL
New Nintendo 2DS XL review: A top-notch gaming portable - CNET
Japan gets Pokemon 2DS Special Editions for Virtual Console release - Vooks