Fang

Fangs, A.K.A Bats, are blue bats with red wings that have the same mannerisms as the Swoopers. Bats appear in the cave levels of Super Mario World 2: Yoshi's Island, Super Princess Peach, and Yoshi's Island DS. When Yoshi (or the protagonist of whatever game they are encountered in) gets too close to one, the Fang will fly in his direction from its sleeping position. For some reason, when Fangs fly, small, white dots appear behind them before disappearing. Yoshi can lick one up to make an Egg.

Fangs were also seen in Yoshi Touch & Go, where they patrolled ground areas and appeared not only in caves, but also in additional areas such as jungles and fields. These Fangs could only be found sleeping on ceilings in cave stages, and were otherwise always in flight, soaring up and down at varying intervals. If shot down with an egg or stomped, these Bats were worth two points, and encasing them in a bubble could earn the player a Blue Coin. On a related note, Bats were also present in the Balloon Trip tech demo which eventually evolved into the final Yoshi Touch & Go. In Balloon Trip, Fangs were found in the sky (an area they were ironically absent from in Yoshi Touch & Go) and continually circled around; such a role was taken up by red Fly Guys in the final Yoshi Touch & Go.

Super Princess Peach had Fangs. They could be killed in any way. Glad Fangs were also introduced.

In Yoshi's Island DS, Fangs came back, and were classified as Airborne Enemies (proven by the Island Museum). Fangs were seen more in Subterrianal areas than in airborne areas, thought. Their first appearance in that game was in World 3-5, named Heeeeeeere's Wario!.