Pig

Pigs first appear in The Wind Waker and behave similarly to Cuccos.

The Wind Waker
In The Wind Waker, pigs are generally peaceful animals that struggle in vain when picked up. They come in three varieties: pink, black, and pink with black spots. The easiest way to pick up a pig is to sneak up to it. An alternative would be to chase it into the water and wait for it to come back to shore, where Link can pick it up before it starts running away. Pigs love to eat, and if they are fed All-Purpose Bait, they might dig into the ground and release some rupees and items. If a pig is attacked too many times, it turns red in anger and relentlessly retaliates against Link. If there are any nearby pigs, they will also attack him, much like the Cucco's Revenge Squad. The pigs will stop chasing Link if he enters a building or goes to a place where they can't reach him, like on top of a high object or in a body of water.

After returning to Outset Island from his quest at Greatfish Isle, Link finds that one of the pigs has grown immensely. This pig can be provoked as well, and it will deal out three hearts of damage if Link is hit by it, which is more damage than Ganondorf can deal. If Link has the Power Bracelets, he can pick the pig up and carry it, but will walk as though he is wearing the Iron Boots. This pig can also swim, and it is possible to throw it behind a rock and pin it there.

Color Changing Tingle's Love Balloon Trip
In Color Changing Tingle's Love Balloon Trip, the Save Pig is what allows Tingle to save the game. At least one Save Pig will appear on each of the 14 Pages, but there will occasionally be more, such as on pages 6, 7, 8, and 11.

Trivia

 * One of the pigs on Windfall Island is rather gassy when Link picks it up, with little green clouds coming out of its rear.
 * If more than one pig is placed in Abe's pen at the start of the game there will only be one in there later on. If you go inside Abe's house, the owners of the pigs admits to eating the other pigs.
 * In Super Smash Bros. Brawl, the pigs are seen as both part of a victory pose of Toon Link's and as a trophy.