Minecraft Dungeons:Jellie Cat

The jellie cat is an unused mob that appears within the Minecraft Dungeons Cross-Platform Play Trailer, where two jellie cats are seen near Dani, with one on her seat behind her and one beside her. A third jellie cat is seen by the fish tank looking at the fish. It only appears in trailers, never getting added in the game itself.

Trivia

 * The jellie cat is the only mob seen in trailers that has no correlation to the game itself, even in files.