Nintendo Support: Which Controllers Are Compatible With the NES Classic Edition?

Nintendo Classic Mini NES: The must-play games

Nintendo Support: Which Controllers Are Compatible With the NES Classic Edition?

Review: The NES Classic Edition and all 30 games on it

The best NES Classic Edition wireless controller - The Verge

NES Advantage - Wikipedia

mods, hacks, and improvements to extend the NES classic

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NES Classic Edition F.A.Q.: Everything You Need to Know About Nintendo's NES Mini

Nintendo Super NES & NES Classic Edition Ultimate, Full Collection of – Game Gear

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You can play the NES Classic wirelessly with this tiny adaptor - The Verge