It's a game where you have to listen to what they all say and then figure out who is lying.
It seems there will be a maximum of two of them who are not telling the truth.
Touch the gosts' faces to hear what they have to say.
Let's concentrate on what A and B said first.
A said that nobody is lying, and B said that one person is lying.
They are saying different things, so at least one of them must be lying.
Continuing on from hint one...
C said that two people are lying.
A, B and C are all saying different things, so that means that two or all of the must be lying.
Continuing on from hint two...
Going by the into in the puzzle explanation that there can be a maximum of two liars among the ghosts, that means only two of A, B and C are lying.
One of them is telling the truth, which means D was not lying.
Continuing on from hint three...
Now let's figure out who was lying.
Two of them were lying, so listen again to what they said and figure out which two it is.
Answer for 'Fibbing Phantoms'
The answer is 'AB'.