Name a cartoon from the past that younger generations haven't heard of

[sop]

26. Felix the Cat (created 1919)

"Felix the Cat is a cartoon character created in 1919 by Otto Messmer and Pat Sullivan during the silent film era. An anthropomorphic young black cat with white eyes, a black body, and a giant grin, he is often considered one of the most recognized cartoon characters in history. Felix was the first fully realized recurring animal character in the history of American film animation."

https://en.wikipedia.org/wiki/Felix_the_Cat