Nijikaku (jp. 虹裏☆格ゲー) is a M.U.G.E.N fighting game community project by anonymous users of the image board website Futaba Channel, also known as 2chan. The game's characters and stages are based primarily on Japanese internet and meme culture.

Nijikaku began developement in 2005<a href="https://mugen.fandom.com/wiki/Nijikaku#cite_note-2"><span>[</span>2<span>]</span></a>, and has been irregularly updated since then.

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