Bow-Wow

The Bow-Wow is a version of the Chain Chomp from Super Mario Bros. It is found in A Link To The Past, Link's Awakening, and Four Swords Adventures. In Link's Awakening, Madam MeowMeow is the owner of Bow-Wow. She lives in Mabe Village and after completing the Tail Cave dungeon, Bow-Bow is kidnapped by a gang of Moblins. Link rescues him and uses him to enter the second dungeon, Bottle Grotto.

Bow-Wow eats any enemy that stands in Link's way.

There is also a picture that can be taken with Bow-Wow in Link's Awakening DX.