The Bat Key Pogo Stick is a limited rare toy in Adopt Me! that was added to the game on March 31, 2022, as part of the 2022 Gift Refresh Update. It can be purchased for 70, 199, or 499 from Small, Big, or Massive Gifts. It can also be obtained through trading.
It serves no other purpose aside from being a fun pogo stick to jump around on.