Bat Hat Minnie is a Premium Box Tsum. She is currently only available on the Japanese version. She is a Limited Time Event Tsum and is not available from purchasing Premium Boxes. She was introduced to the Japanese version in tandem with the Halloween 2017 Event (October 2017).
At skill level 3, BHM can average 2300 coins per ❤️, with the coin bonus applied. When her skill is ready, simply pop each bat from bottom to top, being careful not to pop a bat over an empty space. No need to rush this. Make sure tsumus have fallen behind each bat before breaking them. After all bats are popped, pop magic bubbles from top of the game screen first , then work your way to the bottom. Often times, by the time you pop 10 bats and the bubbles they created, her skill will be ready to use again.