Unlocking Phoenix Mode?

I've noticed that despite the article telling the reader how to unlock Ra's Phoenix Mode, the article doesn't mention where the player was supposed to get the code from. Is there any source for it? An in game one would obviously be preferable. --Mu695 (talkcontribs) 17:27, May 24, 2017 (UTC)

Pretty sure the only way to get it at the time was from a magazine or something like that. --Froggy25 (talkcontribs) 04:19, September 3, 2017 (UTC)
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