Creep

Big Keese, also called Battle Bats   and Bats,  also formatted as bats, are a species which are related to Keese which appear in The Legend of Zelda: Link's Awakening. They have a dark body with two large eyes and two insect-like wings, and slightly resemble cartoonish flies. Big Keese appear during the fight against the Grim Creeper. During the fight when the Grim Creeper plays his piccolo six Big Keese appear. He then points his piccolo forward, causing the Big Keese to dive towards Link. Big Keese can be hit while diving. If six Big Keese are defeated when they attack, the fight ends. If any Big Keese fly off of the screen when they attack, the fight continues and six Big Keese appear when the Grim Creeper plays his piccolo again.

On top of the Eagle's Tower, two Big Keese appear above the Grim Creeper. When the Evil Eagle appears, the Big Keese are blown off the screen.

In the original Japanese version, the Grim Creeper calls the Big Keese his 「かわいい てした」 (kawaii teshita, cute minions). In the English translation of the Game Boy game, and its Game Boy Color port, the Grim Creeper calls the Big Keese his "brothers," and hesitates to say that they were "beat". In the Nintendo Switch remake, he instead says they were "some of [his] best friends" while also calling them "creeps."

Zelda Universe

 * "Battle Bats is the name given to the six Keese controlled by the Grim Creeper in Eagle's Tower."

The Legend of Zelda: Link's Awakening

 * Player's Guide: "The Grim Creeper controls the six Bats at once. Destroy all of them before any of them flies away. If one escapes, you must defeat all six again."

The Legend of Zelda: Link's Awakening DX

 * Prima's Official Strategy Guide: "These bats arrive in groups of six when summoned by the Grim Creeper in the Eagle's Tower. Destroy them all quickly or all six will reappear and you'll have to face them all again."

Trivia

 * Zelda Universe accidentally categorizes Big Keese as enemies appearing in The Adventure of Link.
 * In the Player's Guide for The Legend of Zelda: Link's Awakening, it states that Battle Bats are "known as Keese in some regions of Hyrule", despite regular Keese appearing in the game, and the book later calling them using the Big Keese name. Zelda Universe refers to Battle Bats as a group of Keese.