When the cartoon opens, the cuckoo clock in the library sounds, and the camera pans over the room, to the Town Crier who gives a brief introduction. After this, we meet four monsters (Mr. Hyde, Fu Manchu, the Phantom of the Opera, and Frankenstein's monster) who introduce themselves roaring, but then dance briefly to Gossec's "Gavotte."
https://en.wikipedia.org/wiki/Have_You_Got_Any_Castles%3F
Popeye and Bluto are both running for president. They are tied with exactly the same number of votes, but Miss Olive Oyl has yet to cast her ballot. Which candidate will be able to impress her the most and earn her precious vote? 1956
Showdown (1942) is the eleventh of seventeen animated Technicolor short films based upon the DC Comics character Superman.
https://en.wikipedia.org/wiki/Showdown_(1942_film)
Billion Dollar Limited (1942) is the third of seventeen animated Technicolor short films based upon the DC Comics character Superman.
https://en.wikipedia.org/wiki/Billion_Dollar_Limited
In an African jungle, the natives are going about their day, with the jungle elements being intertwined with modern-day elements; for example, the people dancing around a tent when it turns into a makeshift merry-go-round, to the tune of "The Merry-Go-Round Broke Down," which promptly deflates and slows to a halt, and at least one of the denizens wears a top hat in resemblance of minstrel show stereotypes.
https://en.wikipedia.org/wiki/Jungle_Jitters
Sinkin' in the Bathtub is the first Warner Bros. theatrical cartoon short as well as the very first of the Looney Tunes series. The cartoon features Bosko, and the title is a pun on the 1929 song Singin' in the Bathtub.