The CGI animated ads were originally planned to be stop-motion (as was the animation in Tim Burton's early theatrical shorts) but was deemed to expensive.
There are three different opening intros for this cartoon. The first one aired on ABC with alternate animation, for example, Beetlejuice is producing strips on his clothes. The second one is used on FOX, Kids WB, and in syndication, which is the current one they used in the United States, it features newer animation, for example, Beetlejuice rises from the grave and as a corpse. The third one is used when FOX re-ran Beetlejuice, this one re-edits clips from the second introduction and clips from various episodes.