The tag implication #50494 fluffy_pony -> friendship_is_magic has been rejected.

Reason: Fluffy ponies are intrinsically rooted in the Friendship is Magic fandom, with some instances being character clones of sorts. As such, I believe they should be aliased.

https://the-fluffybooru-fluffydex.fandom.com/wiki/Fluffy_Ponies

EDIT: The tag implication fluffy_pony -> friendship_is_magic (forum #362558) has been rejected by @furrypickle.

By the looks of it, they don't have to be associated with MLP. It's possible to have fluffy ponies that aren't directly linked to MLP, which would make the implication bad. The wiki's own example is an OC in the show creator's style, with no cutie mark or anything to indicate they're MLP related (maybe they're TFH related, or from no setting in particular), making the tag incorrect on such an image.

They may be rooted in the fandom, but as far as I can tell, they're not part of the show or any other official source.

The tag implication fluffy_pony -> friendship_is_magic (forum #362558) has been rejected by @furrypickle.