Hey there, I'm DeCool, an admin here on the Sonic wiki.
The pages you made on the Green Hill and Windy Hill Smash stages were deleted for two reasons:
One, we don't make pages outside of the game page (in this case, Ultimate) due to the fact that they are not Sonic games. We have information on them already on their respective pages on Green Hill Zone and Windy Hill.
Two, those pages were copied word for word from the Smash wiki. We do not deal with plagiarism of any kind.
Check out this short list of important tasks to do in the wiki!
Per our art policy, any non-official or non-Sonic images must be accompanied by permission from the original artist before being uploaded, else they may be deleted. If you are the artist yourself, you must state this clearly on the image page.
Please make sure you do not post fan fiction in our mainspace articles. For more info, go here.