Beetlejuice! Beetlejuice! Beetlejuice!
So this is not going to be a chronology, and it's not even really about crossovers. Sometimes the TVCU is about reconciling different versions of the same character. I recently watched Beetlejuice Beetlejuice, and there will be slight spoilers here, so you've been warned. As I watched the movie, my brain kept thinking of how the cartoon could fit in the same universe as this sequel. So following the events of the first film, and prior to the first episode of the cartoon, Betelgeuse and Lydia became friends, and Adam and Barbara went away. The second is explained in the sequel. Lydia found a loophole in the Handbook that allowed the couple to pass on. That would have happened prior to the cartoon. Perhaps Betelgeuse helped with this and that's how they became friends. Then would follow the wonderful animated series. Following the animated series, Betelgeuse, having fallen in love with Lydia, must have crossed some boundaries as he tends to do, pushing Lydia