This is because Zoroark and Zoroark-Hisui do not have a fixed level in Random Battles. Their levels are automatically set equal to the level of the 6th Pokemon in your party, so that the Illusion is not given away. You can just change it manually to whatever level you get.Zoroark and Zoroark-Hisui have their levels set to 0 in the Random Battles S/V Calculator, making calculations as if they were level 100 display.