In case you're wondering how Beetlejuice got the toys from "The Nightmare Before Christmas," Beetlejuice visited Halloween Town, after reading the Neitherworld news about what happened when Jack Skellington decided to take the job of Santa Clause.
When Santa fixed Christmas, Jack had to take the toys back until Beetlejuice convinced the skeleton that only Claire Brewster would enjoy Jack's presents.
After that Jack lent his bag of toys to Beetlejuice and this is what had happened.

Have a Scary Christmas