Pet Bat

o The Bat is a members-only land pet that made its first debut in October 2011. They disappeared in November 2011, then returned in early 2012 during the Spooky Party. They re-appeared at the Haunted Forest Party in October 2012. They came back to the Spooky Party for 2013. Last year, when the hidden bat in the wallpaper is clicked, the Bat Pet Finder is opened. The Spooky Party doesn't come on often, so one may not be able to obtain a bat. To find the pet bat in 2014's Spooky Party, it's on the first floor in the haunted house near the sales place. Click the top right corner, and a Bat Pet Finder opens. When clicked, they fly towards the screen, one of the many common 'Horror clichés.' Shortly after, the Bat flies back to its owner. This makes the bat currently have the largest pet sprite in the game.

Bats are commonly used around Halloween, since they are typical bat-themed decorations during Halloween in reality.

Trivia
*When the Bat's sprite is enlarged, its accessories sometimes disappear for a moment.
 * Bats act no differently when they are are placed 'above' water.Animaljam- How to Find the Pet Bat in 2014's Spooky Party-0