Skeleton Goonie

Skeleton Goonies are skeletal undead versions of Goonies that appear in Super Mario World 2: Yoshi's Island, Yoshi's Island: Super Mario Advance 3, Yoshi Touch & Go, Yoshi's Island DS, Yoshi's New Island, and Yoshi's Woolly World. Unlike normal Goonies, they cannot be ridden on, and will lose their wings and fall if this is attempted. They also fall if attacked with an egg. Some carry bombs to drop on Yoshi, similar to regular Goonies, but they never carry green Shy Guys. Oddly enough, they have feathers even though they have skeletal wings. A flightless variety exists known as the Flightless Skeleton Goonies.

Super Mario World 2: Yoshi's Island
In Super Mario World 2: Yoshi's Island, even though they had their own level, World 6-1: Scary Skeleton Goonies!, they debuted in the first skiing part of World 5-3: Danger - Icy Conditions Ahead. They also appear in the opening segment of King Bowser's Castle.

Yoshi Touch & Go
They appeared in Yoshi Touch & Go where they behaved like their non-skeletal counterparts, flying in the top screen, sometimes dropping bombs and Shy Guys. Hitting them with an egg rewards a Blue Coin.

Yoshi's Island DS
They also appear in Yoshi's Island DS and Yoshi's New Island with little to no differences in behavior or physical appearance. In the former, due to them using sprites edited from Super Mario World 2: Yoshi's Island while Goonie uses sprites edited from Yoshi Touch & Go, Skeleton Goonies are conspicuously smaller than ordinary Goonies.

Yoshi's New Island
They appear in Yoshi's New Island, where they appear in Bowser's Castle Break-In.

Yoshi's Woolly World
They appear in Yoshi's Woolly World in three levels: Kamek's Last-Ditch Flyby, King Bowser's Castle, and Skeleton Goonies' Lava Lair. Like most other elements in the game, Skeleton Goonies have a woolly appearance.

Yoshi's Crafted World
Despite not reappearing in Yoshi's Crafted World as enemies, Skeleton Goonies cameo as platforms in Poochy's Magma Run and background elements in the first phase of The Great King Bowser.

Super Princess Peach
Skeleton Goonies as well as Flightless Skeleton Goonies also make a cameo appearance, though not as an enemy, in Super Princess Peach. They appear in the background of the Wavy Beach minigame in the level where Gooper Blooper is fought.

Super Mario World 2: Yoshi's Island

 * Shogakukan guide: あほーどりみたいに、背中に乗せてはくれない. 爆弾を運んで来ることもある. (They don't carry you on their backs like Goonies. Sometimes they carry bombs.)
 * Player's Guide: Unlike their feathered family-members, you can't hitch a ride on a Skeleton Goonie.

Yoshi's Island: Super Mario Advance 3

 * Shogakukan guide: あほーどりのように背中に乗ることはできないが、ふみつけたり食べてからはき出すとほねあほーむしになる. 爆弾を運んで来ることも....... (They cannot ride on their backs like Goonies, but if you step on them or eat them and then spit them out, they become Flightless Skeleton Goonie. They can also carry bombs...)

Yoshi Touch & Go

 * Shogakukan guide: 上空の左右どちらかから現れ、ヘイホーを落として去っていく. 見逃すと何度でもヘイホーを連れてもどってくるので、早めに倒しておきたい. ヘイホーを落とす前をねらうといい. (They appear from either side of the sky, drop a Shy Guy, and leave. If you miss them, they will come back again and again with Shy Guys, so it is important to defeat them as soon as possible. You should aim at them before they drop their Shy Guys.)

Yoshi's New Island

 * Shogakukan guide: ホネだけになったあほーどり. 水平にゆっくりと飛んでくる. あほーどりと異なり、乗った瞬簡に翼が崩れる. そのため、長時間乗り続けることはできない. (A Goonie, reduced to only bones. It flies horizontally and slowly. Unlike the Goonies, its wings collapse the instant it is ridden on. Therefore, it is not possible to continue riding it for a long time.)