Sorry for not uploading often again. School just got worse since I am about to end 6th Grade. Credit for some videos: Logical Smash and Random Guy Productions 10 june EDIT: (1:28) Happy 85th anniversary Soyuzmultifilm
MGM parodies and references that you forgot: Booba: Episode: Attic Cine Cartoon (Cartoon Network LA, 2019) Nicktoons UK: History of Animation (2006/2007)
There's also a trailer of Gummibär & Friends: The Gummy Bear Show, where in the start of the trailer and the movie, the reindeer spoofs the MGM lion, and The Yummy Gummy Search for Santa too.