Rat

These enemies are pretty harmless, and are found in many dungeons.

A Link to the Past
The lowest of creatures that inhabit the sewers and dark palaces of the land. Rats can be defeated by any means but are sometimes too fast to handle 

Wind Waker
Give them All-Purpose Bait, and they'll share some of their treasure with you; Don't, and they'll take some of yours. While holding bombs, they're called Real Bombchus.

Twilight Princess
The rats in Twilight Princess, have a more feral or animalistic look to them. They are vile pests that can be found in caves or in the Arbiter's Grounds feeding off of skeletons. They also have a Twilight version called Twilight Vermin and have a squid-like appearance.