The Witches (1990) ending / spoiler
Mouse Luke pours the formula into the soup that all the witches (including the grand high witch) eat, they all turn into mice and are killed by the hotel employees. Luke goes back to the grand high witch's room and puts a mail tag on a trunk full of the money that was supposed to be used to buy the sweet shops to turn children into mice. The trunk is sent to his grandmother's house. In the middle of the night, Miss Irvine comes and turns him back into a human, happy that she is now free from the grand high witch.
Submitted by Hillary K.