In Twilight Princess, Rats can sometimes be found gnawing on Skulls. Another type of Rats, called Ghoul Rats, cling onto Link, preventing him from running and jumping off platforms. When they cling to Wolf Link, Midna will become uneasy, looking down nervously at the Ghoul Rats covering Link's body. Ghoul Rats can only be seen and destroyed when using Link's wolf senses. A Spin Attack can be used to remove all at once.
Phantom Hourglass
In Phantom Hourglass, Rats usually appear from small holes in walls. They generally act as simple obstacles and are easily defeated in one hit.
Spirit Tracks
In Spirit Tracks, Rats sometimes carry a Small Key, so Link must defeat them in order to obtain it. If one gets near a Phantom possessed by Princess Zelda, she will scream and cower, not being able to move again until Link defeats it. During the first phase of the fight with Malladus, Cole attacks Phantom Zelda with ghostly Rats that tend to attack her. If one of these Rats hits Princess Zelda, Cole will take control of her, forcing Princess Zelda to attack Link.
A Link Between Worlds
In A Link Between Worlds, Rats appear in the Secret Passage that Link uses to get inside the Sanctuary after Yuga locks the doors. Dark Rats, a stronger variation of Rat, also appear mostly in Lorule.
Tri Force Heroes
In Tri Force Heroes, there are two varieties of Rats; however, they have no difference except for their color. Regular grey Rats are generally found in The Ruins, attacking the Links normally. Blue Rats tend to appear in the Ice Cavern, and sometimes hide inside Snowballs.
Shiyou Rats are the weakest and most common variety, found in Hometown Prairie, Sunshine Seashore, and the Pirate Hideaway. They are not aggressive and tend to avoid Tingle if he goes near them. They are the weakest enemy in the game and regularly drop Bone. One of the Pirates owns a pet Rat called Ratty.
Chu Rats are larger, stronger versions of Shiyou Rats and also appear in Hometown Prairie and Sunshine Seashore. They are much more aggressive than the smaller variety and squeak and charge at Tingle when they see him.
Rotten Rats are found only in the Pirate Hideaway. They are dark purple in color, aggressive, and much stronger than any other kind of Rat. They also only drop Rupees when defeated.
Gold Rats are rarely found at the Hometown Prairie in place of Shiyou Rats. As with all the rare gold enemies, they drop a large number of Rupees when defeated.
↑Encyclopedia, Dark Horse Books, pg. 200 (ALttPA Link to the Past | TWWThe Wind Waker | TWWHDThe Wind Waker HD | FSAFour Swords Adventures | TPTwilight Princess | TPHDTwilight Princess HD | PHPhantom Hourglass | STSpirit Tracks | ALBWA Link Between Worlds | TFHTri Force Heroes)
↑These creatures attack spontaneously and attempt to steal Rupees. The ones that carry bombs around are apparently known as Bombchu. — Figurine (The Wind Waker)
