Bowser should wear his crown, but only when he is in battle with the Mario Bros. That would make him seem more meneacing and would prove to them that he is the King of all Koopas!
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MICROSFT: Nintendo is so old, you should retire! You will fall to the wrath of Microsoft!
NINTENDO: Well, at least WE know how to make good games! Long live Nintendo!
SONY: I like cheese...