I may only have one ghost Pokemon (my Chandelure, Captain) but my experience with him is similar. He's got Flame Body so I can't physically touch him without getting burnt. :(
Have you tried experimenting with different types of foods to see what she likes? I've found that playing catch with Captain and rewarding him with a berry for retrieving the ball in his own ghosty way makes him happy.
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Have you tried experimenting with different types of foods to see what she likes? I've found that playing catch with Captain and rewarding him with a berry for retrieving the ball in his own ghosty way makes him happy.