Bullbo

Bullbos are boar-like animals that appear in the Legend of Zelda video games.

Twilight Princess
Featuring most prominently in Legend of Zelda: Twilight Princess, they are regularly used as mounts by Bulblins. Link frequently encounters Bulblins riding on Bullboback whenever passing through Hyrule Field who will attack by charging at him. The Bullbos cannot be hurt by any of Link's weapons, but their Bulblin riders can be struck and thrown off, allowing Link to ride a Bullbo if the player so chooses.

While being ridden by Link, a Bullbo will frequently buck wildly to try and shake him off. While the player has control, the Bullbo can be used to charge and ram into enemies or destructible obstacles and barriers. If the Bullbo mount rams into a non-destructible wall or object, Link will be thrown off.

Spirit Tracks
Bullbos are found roaming near train tracks. Their appearance is similar to their Twilight Princess design. Bulblins again use Bullbos as mounts. If Bullbos are situated on the tracks, Link can activate the whistle on his train which will scare the Bullbo off the tracks. Alternatively, Link can shoot two cannonballs out at the Bullbo to defeat them. If Link's train runs into the Bullbo, the train will take damage.