How Can I Make A Ghost Enemies??

[Kyle]

SetEnemyActive("MonsterName", true);

You have to place the monster in the game, then, when selected, uncheck the box "Active", then go to it's properties and then check the box "Hallucination", but I don't know what it's called exactly. Then it should work once you insert that script command in the correct function related to a SetEntityPlayerInteractCallback with the item.