Cooligan

Cooligans are penguin enemies found in the game New Super Mario Bros. Wii. They are 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. It takes two jumps to defeat one. One jump will knock off a Cooligan's shades, slowing them down. In this state, if rammed by another Cooligan, they will be defeated. These creatures can be defeated instantly by a Fire Flower, Star, or being frozen via Ice Flower or Penguin Suit. 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.

Trivia

 * The Cooligan's name is a portmanteau of the words cool and hooligan.
 * The Cooligan's attack pattern is notably similar to another penguin-based enemy, the Lemguin.