Skullfish

are recurring enemies in. They are skeletal fish that are similar in behavior to piranhas.

In, NaN Skullfishs live in the seas around MM:, as well as in the water just outside of the MM: after defeating MM:. They spawn at certain intervals within the Bay and swim towards MM:, biting him if he does not raise his defenses. MM:'s electrical shield attack can be used to defeat them. In, they can also be caught in the MM3D: by wearing the MM3D:.

In, NaN Skullfishs appear in the TP:, as well as several secret NaN Caves around TP:. They can be caught with the TP:, and will even drop a TP: when released, although they are forbidden fish and will not be recorded in the TP:.

In, NaN Skullfishs are found exclusively in the TFH:. They viciously attack any TFH: they find swimming near them, and will leap out of the water to get to TFH: standing on raised platforms. To defeat them, they can be slashed with the TFH: while they leap over a TFH:, or dredged from the water with the TFH:. They can then be attacked as a normal enemy. In this appearance, they are green rather than bone-colored.

There is also a desert variant of this enemy called the TFH:, which instead inhabits the sand of The Dunes, but behaves identically.

In, NaN Skullfishs appear as Weird-type HW:. They are imbued with the Darkness Element. When consumed by a HW: in the HW: of the HW: mode, NaN Skullfishs can increase the Fairy's Trust level and personality traits.

Nomenclature
The Japanese name of the Series:, "Sukarugyo," is a combination of Japanese transcript for "Skull," and (fish).