Penguin

Penguins have appeared as enemies many times in the Crash Bandicoot series. The have appeared in Crash Bandicoot 2: Cortex Strikes Back, Crash Bandicoot 3: Warped, Crash Team Racing, Crash Bash, Crash Bandicoot: The Wrath of Cortex, Crash Bandicoot: The Huge Adventure, Crash Twinsanity and Crash Tag Team Racing. Penguins in Crash Bandicoot 2: Cortex Strikes Back will generally walk left and right one time, spin, and repeat. These penguins can be defeated by a general side attack when they aren't spinning. They can also be jumped on at any time. Rarely, penguins will slide down hills facing the character, similar to seals in the forward-moving areas of the snow-themed levels. In Crash Twinsanity, the penguins' movements reflect their personalities. When surfing on Cortex, penguins act as a background, never catching the player, but just filling in for the story. In Cortex's Icy Lab, however, when you walk close enough to a penguin, they will launch themselves at you and blow up. In The Wrath of Cortex, the Penguins' form is much like the Crash 2 Penguins, but they waddle to one wall, turn around and spin to the other, and it will constantly do this until it is defeated.

Crash Bandicoot 2
They are minor enemies in the snow/ice levels (Snow Go, Snow Biz and Cold Hard Crash) Here, they are one of three typical snow enemies, including porcupines and seels. Some penguins will walk back and forth, spin, get dizzy, and repeat the process. Others will slide down at Crash while walking forward.

Crash Twinsanity
Their largest role might be in Crash Twinsanity. One part is that when Cortex was talking to one of them, saying that a check has expired, the penguins get angry. Cortex then asks if they want a fish, but they, using their voices, found out he drew his gun out and after one of them was shot, the rest of them angrily leave. They may have betrayed Cortex because of this (probably why they attack Crash and Cortex). They appear again chasing both Crash Bandicoot and Cortex on a snow ride shortly before Cortex's mother is heard. They didn't succeed in catching them so they exploded. To defeat the penguins, Cortex can shoot them with his ray gun, or Crash can spin them. There are a lot of them in the Ice Climb level. They have jet packs that they can use to slide after Crash and Cortex (in the humiliskate levels), charge at Crash, or fly in the air and try to dive-bomb Crash. These attacks are very easy to dodge.

Penta Penguin

 * Main article: Penta Penguin

Penta Penguin, the only penguin so far in the series to be named, appeared as a hidden character in Crash Team Racing (via a code only), but was first seen in the Dingodile boss fight in Crash Bandicoot 3: Warped. He later was seen in the Snow Bash mini-game in Crash Bash.

Trivia

 * The penguins may be seen in Crash of the Titans in their torpedo pack in one of the Doctor N. Gin episodes.
 * To unlock Penta Penguin in CTR, hold L1 and R1 and then type down, right, triangle, down, left, triangle, up.
 * In the PAL version of CTR, Penta is just as fast as Oxide, while in the North American versions of the game, his racing stats equal that of Pura, Ripper Roo and Polar.
 * In Crash Bandicoot: The Wrath of Cortex the sound the penguin makes when it spins sounds exactly like Crash's spin.