New research has been done on some Z-Moves for Status Moves and have been listed in the following pastebin. All work was done by ΩDonut, give him a follow if anyone is interested in any datamine work.
Z-Move Status Effects
Also Z-Crystals can't get "Knocked Off", similar to Mega Stones.
Z-Move Status Effects
Also Z-Crystals can't get "Knocked Off", similar to Mega Stones.