As far as I can find, the first feature film with an elephant was Dumbo in 1941
On November 7, 1874, Harper's Weekly featured a cartoon about criticisms of President Grant, an image which includes the first important use of the Republican Elephant.
Steamboat Willy!
The Republican sign is an elephant due to a political cartoonist. Cartoonist Thomas Nast drew a cartoon in Harper's Weekly, the cartoon he drew an elephant and called it the republican vote. Since them the elephant was associated with republicans.
republicans
A political cartoon by Thomas Nast, published in Harper's Weekly on November 7, 1874, is considered the first important use of the symbol .
Dumbo the elephant
it was the sharon lois and bram had a elephant dancing in the last part of the elephant show
Dungeons and Dragons
Doug
Featured in the Popeye comic strip in 1936.
This comes from a 1860 political cartoon.
The 1982 animated movie The Last Unicorn featured a unicorn. Several unicorns also appeared in the My Little Pony cartoon series.