According to the Wikipedia on List of poker hands, the highest rank is "Five of a kind" and there is a Joker on it. It also wins against "Straight flush" and below.
A⋄ A♣ A♥ A♠ + Joker
This is the first I see that hand because I only play Texas Hold'em Poker.
So can anybody give some information on that? Is there any real game play on that type in the casino?