From the Super Mario Wiki
The title of this article is conjectural; an official name for the article's subject has not been found, so it has been given a fitting title by editors. If an official name appears, it is requested that the article be moved to the correct name.
A Para Mask Koopa is a type of Mask Koopa (a Koopa Troopa with a Mario mask) with wings. It is only found in Super Mario World after the player finishes all the special levels on Special World. These creatures acts the same way as Koopa Paratroopas, the only difference is the Mario Mask that they wear. When jumped on, they will lose their wings; a second jump will make the Koopa inside the mask drop the mask. Mario will then be able to defeat the Para Mask Koopa.