Wierdly enough, they never actually say that they're related. Even the official word of Nintendo for the the relationship of these two is "up to the players imagination". It's just that them being siblings is the most common theory and people simply took it as fact after a while.
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DatFeelix64
Dec 07, 2014 at 04:23AM EST in reply to
Monsior Lemonz
Dec 07, 2014 at 02:15AM EST