Batarang

A Batarang was a bat-shaped object wielded by Batman.

History
Batman held a Batarang during several of his travels alongside Gandalf and Wyldstyle, such as when visiting New York City, finding Sloth in a cave, and visiting the Land of Ooo. (WC: )

Other references
Maxwell Collins was aware that Batman had a Batarang, among other things, in the context of comic books. He mentioned this in discussion with the Twelfth Doctor over who would win in a fight between Batman and Captain America. (COMIC: )

In non-valid sources
While in a room, Batman threw a Batarang that flew past Emmet Brickowski and Scooby-Doo before hitting Superman on the head. (WC: )

Other matters
Batarangs originate from the DC Multiverse.