Gusty

Gusties (also erroneously referred to as Blusties ) are long, smiling ghost-like creatures that appear in the Yoshi franchise. They always travel in huge packs, allowing the Yoshis to eat them and get extra eggs. They can be used as stepping stones to reach higher areas. In addition to possibly knocking the baby off Yoshi's back, they can spawn endlessly in some areas.

They appear in levels where the terrain is bumpy and uneven. Gusties are prominently featured in the levels What's Gusty Taste Like? and Gusty Glory.

In Yoshi's New Island, their model has a separate face on each side, likely due to the position of their faces in the artwork coupled with the exact way their transparency works.

In Yoshi's Woolly World, Gusties are made from a spiral of string, which can be eaten by Yoshi to create a yarn ball.

In Yoshi's Crafted World, they have no arms, and are defeated in the usual methods, along with running into the wall.

Super Mario World 2: Yoshi's Island

 * Shogakukan guide: 空中をつむじ風のように横切って行く. うじゃうじゃいるので、けっこうじゃま. (They cross the sky like a whirlwind. They are so numerous that they are quite a nuisance.)
 * Player's Guide: If it's a blustery day, you'd better watch out for these gale-riding ghosts both in and out of doors.

Yoshi's Island: Super Mario Advance 3

 * Shogakukan guide: ふれるとヨッシー背中にとりつき、ヨッシーの操作を左右逆にしてしまう. 赤ちゃんを取りもどせば、すぐに回復する. (They cross the sky like a whirlwind. They come out in droves, so it's quite a jam. If you encounter one in front of you, eat it quickly to avoid it.)

Yoshi Topsy-Turvy

 * Shogakukan guide: 空中をゆっくり飛んでくる. 倒すには、食べるか踏むかすればよい. また、本体を傾ければ、つむじくんの飛行コースを変えることができる. (It flies slowly through the air. To knock it down, simply eat it or step on it. You can also change the flight course of the Gusty by tilting the device.)

Yoshi Touch & Go

 * Shogakukan guide: 画面の左右どちらかから現れ、かなりのスピードで一直線に飛び去っていく. 下画面に現れたときは、雲で行く手をさえぎってからシャボンで包むとよい. (They appear from either side of the screen and fly away in a straight line at a considerable speed. If it appears on the lower screen, block its path with a cloud and then wrap it with a bubble.)