Gekko

Gekko is the mini-boss of the Woodfall Temple and the Great Bay Temple in. It is a possessed frog-like creature.

Strategy
Two Gekkos are fought in-game. The first one is fought in Woodfall Temple. It attacks Link by hopping at him and throwing punches. After taking enough damage, the Gekko will call a giant Snapper into the room and ride on its back. The Gekko must be knocked off of the Snapper, either by using the Deku Flowers as Deku Link or by using explosives such as Bombs. Once knocked off, the Gekko will run along the walls and ceiling of the room. Link must then shoot it with his Bow in order to weaken it. The Gekko will then hop back onto the back of the Snapper until Link knocks it off again.

The second Gekko is found in the Great Bay Temple, and hops along the ground among a group of Mad Jelly, occasionally throwing one at Link. When attacked, it will bound toward the ceiling as all of the Mad Jelly collects into a single mass, encasing the Gekko. A single Ice Arrow will freeze it inside, sending the Gekko sailing down to the floor, which shatters the Mad Jelly as the Gekko is freed and allowing Link to attack it. If Link fails to shoot the Gekko, or gets to close to the Mad Jelly blob, he will be trapped inside. The Gekko will follow up with repeated punches, which it then finishes with a mighty left hook that breaks Link through the bubble, causing serious damage.

Once they are defeated, they will revert back into their normal frog forms.

Etymology
Because the Gekko does not resemble its real-life namesake and because its name is only used scientifically, it may actually be a reference to the Nintendo GameCube's CPU, which shares its name with the enemy. This is possible because the GameCube was in development during the same period as Majora's Mask was.

Trivia

 * The Chu Worms which appear in the Lakebed Temple and the Cave of Ordeals in are similar to the Gekko and Mad Jelly.