I have made a picture of a Z Crystal for my favorite lockemon or fakemon, Snugooi. I used the backside of Snugooi to make the symbol. It was not easy but I made this artwork.
This is a Z-Crystal for Snugooi called Snugooinium Z or スヌーグイZ in Japanese.
Snugooi © @lockstin_gnoggin @giodude1580 and @Doodlelotl
Lockemon © @lockstin_gnoggin
Z Crystal © Pokémon
Pokémon © Game Freak/Nintendo/Satoshi Tajiri