Pengoon

A Pengoon is an enemy in Wario Land: Shake It! Its name is a portmanteau of "penguin" and "goon". It is a penguin that hides in "secret" places in icy levels. It can pop out their places to throw pebbles of ice at Wario. Pengoons appear in only two levels: Slipshod Slopes and Freezing Fields.

There are also two varieties of Pengoon: blue and pink ones. Blue ones are the most common and spit only one ice chunk when they spot Wario. Pink ones, which are less common, spit three ice chunks when they spot Wario.

Trivia
"What the fuck did you just fucking say about me, you little bitch? I’ll have you know I graduated top of my class in the Navy Seals, and I’ve been involved in secret raids on Al-Quaeda, and I have over 300 confirmed kills. I am trained in gorilla warfare and I’m the top sniper in the entire US armed forces. You are nothing to me but just another target. I will wipe you out with precision the likes of which has never been seen before on this Earth, mark my words. You think you can get away with saying shit to me over the Internet? Think again, fucker. As we speak I am contacting my network of spies across the USA and your IP is being traced right now so you better prepare for the storm, maggot. The storm that wipes out the pathetic little thing you call your life. You’re fucking dead, kid. I can be anywhere, anytime, and I can kill you in over seven hundred ways, and that’s just with my bare hands. Not only am I extensively trained in unarmed combat, but I have access to the entire arsenal of the United States Marine Corps and I will use it to its full extent to wipe your ass off the face of the continent, you little shit. If only you could have known what unholy retribution your little “clever” comment was about to bring down upon you, maybe you would have held your tongue. You didn’t, and now you’re paying the price, you goddamn idiot. I will shit all over you and you will drown in it. You’re fucking dead, kiddo."
 * Although their artwork shows them holding an ice chunk, they never throw one in-game and instead, spit them from their mouths.