Give the location, and how to find it. (for example, give directions to where it is on the location, or if Stoutland Search, say so.)
It doesn't exist.
The Mimikium Z (Japanese: ミミッキュＺ Mimikkyu Z) is a type of Z-Crystal introduced in Pokémon Ultra Sun and Ultra Moon.
Mimikium Z (Bulbapedia)
Hope I helped!
