Beetlejuice

The premise of the animated series was greatly changed from the film, to the point where one only superficially resembled the other. In the film, Beetlejuice was the antagonist, who ended up nearly marrying a disgusted Lydia; in the series, they are best friends, and Lydia, something of a social misfit in the living world, frequently visits him in the afterlife during her free time. The Maitlands, the most significant characters in the film, are nowhere to be found in the series. And unlike the mind-numbing bureaucracy that is in the movie, the afterlife was converted into "the Neitherworld", a bizarre and humorous parody of the living world, with the fact of it being the afterlife only rarely mentioned, and the living world was referred to once or twice as "the Outerworld" (or as "the Otherworld").

Source: Wikipedia.org