Cooligan
Cooligans are enemies found in the game New Super Mario Bros. Wii. They resemble as blue penguin like creatures that sport a pair of sunglasses.
These enemies first appear in World 3 and usually appear in ice levels. They are seen sliding and can damage Mario and the others if they run into one of them, although if Mario or anyone else is in the Penguin Suit and they are sliding too, then they will bounce off unhurt. It takes two jumps to defeat one. One jump will knock off a Cooligan's shades, slowing it down. They will also fall down holes rather than hovering over them. In this state, if rammed by another Cooligan, they will be defeated. These creatures can be defeated instantly by a Fire Flower, Star, being frozen via Ice Flower, or Penguin Suit, or by Ground Pounding them. It should be noted though that Cooligans will continue to slide even if they are frozen, allowing the heroes to use them as platforms to reach Star Coins and other objects. They reappear in World 9-5.
