When Zazu was empting his bucket, a lot of things fall out like Scar alive. Um, didn't Scar Die in The lion King? Or were the Hyenas Just teasing him?
In the segment "Zazu's Day Off", whilst searching for the book on how to move elephants, Zazu reads off titles from his bookshelf, which are puns of famous literary works. They include: Of Mice And Hen (Of Mice And Men) The Great Batsby (The Great Gatsby) The Red Badger of Courage (The Red Badge of Courage) Cannery Crow (Cannery Row) Donkey Quixote (Don Quixote) The Apes of Wrath (The Grapes of Wrath) For Whom the Bull Tolls (For Whom the Bell Tolls) In addition, when Zazu starts to make it rain, he says "Tut, tut. It looks like rain." This is a quote from Winnie the Pooh & The Honey Tree, based on another great literary work.
In the "I Think I Canada" segment of this episode, Timon signs The Wolverine's contract as "Timon Berkowitz". This may be his last name, or an alias, not wanting to give his real name to the predator.