On Television:
* Scooby-Doo, Where Are You! (1969-1970, then various spin-offs) - This classic mystery-solving cartoon continued to be popular in 1978, airing new episodes of "Scooby-Doo, Scooby-Doo, Where Are You!".
* The Flintstones (1960-1966) - This groundbreaking animated sitcom, about a Stone Age family, continued to air reruns and was still a cultural touchstone.
* The Jetsons (1962-1963) - This futuristic family comedy, about a family living in Orbit City, also continued to air reruns and was popular.
* The Smurfs (1981-1990) - While the show premiered in 1981, it had its origins in the late 1950s and was already popular in Europe. 1978 saw the release of the first Smurfs comic book in English, which likely contributed to the show's growing popularity.
* The Brady Kids (1971-1974) - This animated spin-off of the live-action sitcom "The Brady Bunch" was popular during its initial run, and still saw reruns in 1978.
* Super Friends (1973-1986) - This superhero team-up cartoon featured iconic DC Comics characters like Superman, Batman, Wonder Woman, Aquaman, and others.
* He-Man and the Masters of the Universe (1983-1985) - While the show didn't premiere until 1983, the He-Man franchise launched in 1978 with the first toys and comic books.
* The New Scooby-Doo Movies (1972-1974) - This series featured Scooby-Doo and the gang encountering various celebrities and famous figures, including Batman and Robin, Harlem Globetrotters, and the Three Stooges.
* The Bugs Bunny/Road Runner Hour (1969-1970) - This classic compilation show featured shorts from the Looney Tunes and Merrie Melodies series, showcasing iconic characters like Bugs Bunny, Road Runner, and Wile E. Coyote.
In Theaters:
* The Lord of the Rings (1978) - This animated film adaptation of J.R.R. Tolkien's classic fantasy novel was released in theaters in 1978.
* Watership Down (1978) - This animated film adaptation of Richard Adams' novel about a group of rabbits seeking a new home was released in 1978.
Important Note: This is not an exhaustive list, and there were many other cartoons popular in 1978. This list is meant to highlight some of the most iconic and influential shows from that year.
If you're interested in learning more about specific cartoons or other aspects of 1978 animation, feel free to ask!