Hello, Qwertyvg you have been told to stop editing the Season 10 category on pages. Please refrain from this behavior, it will ultimately get you banned from the wiki. I will assume you are acting in good faith and trying to undo the wiki for the better and missed the https://adventuretime.fandom.com/wiki/Forum:Seasons page where we have discussed the switching of categories. But if you keep on with this behavior after being warned than I will have to ban you from the wiki.
So you said that Ancient Psychic Tandem War Elephant didn't appear in the finale,... I have to revert them back and add the screenshot of that scene as the proof. There are so many minor characters appeared in the finale.
For your information bub you did not make that article or post that other promotional image and your just a newbie. So you don't have the authority to remove it if you don't like it. So just grow up and deal with it like a man instead of a spolied child.