There’s no way to tell for sure that this is a tattoo of the regular and not the sharpie variety, but it’s a crazy idea either way. As we’ve seen, you can scribble your own AR card with magic markers, so this guy thought (naturally) “maybe I’ll just get it tattooed on my arm!” And he did. Or didn’t.
Either way, it works, and it’s Nintendo fanboyism of the highest degree. Except he can’t play using it, because you kind of need your hands for that.