Wisp

Wisps, formerly spelled as Whisps, are a type of Bubble based specifically off the original Bubbles from The Legend of Zelda. Like them, they move around in straight vertical and horizontal lines erratically, moving along and off the edges of walls, and curse Link upon contact, causing him to be unable to use his sword.

The Legend of Zelda: Oracle of Seasons/Ages
In both The Legend of Zelda: Oracle of Seasons and The Legend of Zelda: Oracle of Ages, Whisps appear as rare dungeon enemies and use the original Bubble sprite, albeit solely using the game's red palette. They stand in for normal Bubbles due to them instead using the diagonal bouncing behavior debuting in Zelda II: The Adventure of Link. In the former game, they appear in the Explorer's Crypt and the Sword & Shield Dungeon, while in the latter game, they appear in Unicorn's Cave and Jabu Jabu's Belly. Depending on the game, either Dr. Left or Dr. Troy has a hint about their curses. They are invincible, though the effects of their curses can be negated by wearing the Whisp Ring.

The Legend of Zelda: Four Swords
In The Legend of Zelda: Four Swords, Wisps are extremely rare enemies and resemble Bubbles' appearance in The Legend of Zelda: A Link to the Past. They only appear in higher difficulty levels of Vaati's Palace and come in two colors. The red ones move around normally, but the blue ones deliberately follow Links.

The Legend of Zelda: The Minish Cap
In The Legend of Zelda: The Minish Cap, Wisps appear with their colors from Four Swords, though the blue ones are now simply faster versions of the red ones. A red one is first found in a cave at Veil Falls, and both colors appear alongside each other in Dark Hyrule Castle. When Link is cursed, the Wisp vanishes, he cannot use any item, and a ring of the Wisp's fire surrounds his sprite until it wears off, at which point the Wisp reappears. Hitting a Wisp with the boomerang causes it to disappear until the room is exited, and they can be defeated fully by sucking them into the Gust Jar or shooting them with an arrow.