to: jimmitycrickits
Absolutely- I believe it can be NCP against CP.
In my case I have physical custody but have joint legal with other parent.
He has done so many things that could be construed as PAS. The courts are scattered about PAS though- Not only if it exists, but how to prove it, and even what to do about it.
Example in my case: Other parent says horrible things about me, even tells court it is the child saying things. (Although due to child's age some of the things could not possibly have been said by the child)

The other parent has also made just about every allegation you can make against me. It makes me very very upset- but I have to just remain as calm as possible and cooperate in any way I can through the courts. If they say a certain allegation- I do whatever I can to disprove it. Examples: X said I was on drugs, so I immediately volunteered to drug test. X called CPS to make false abuse/neglect claim, so I gave full access to CPS and signed all releases and allowed them in house etc. without fighting it. X said daughter didn't want to come home to me after visitation- so I brought family members to pick up to see her running to me with open arms as witness'.
My daughter is young and I try not to get into specifics with her~ But she's said "Daddy will be so sad when you don't let me see him" and I reply "I'll always let you see Daddy- no matter what". Or she'll say "---- (Dad's g/f) said Daddy shouldn't tell you anything" and I just reply "Well Daddy can always talk to me if he wants to". etcetera.
Lately my daughter has taken to saying things like "My Daddy lied and said ---- (allegation of the month/week)" and I reply "Is that true?" and she'll say "Yes" and I'll say "Well maybe Daddy was confused about that" and then move the subject on to something else.
My OPINION? Answer briefly in age appropriate manner and try to move on to another topic. It will make it worse if you engage in similar behavior or try to combat the issues through the child. I would keep the debate and hearsay to an absolute minimum with the child(ren).
This is a horrible thing to do to children. If you suspect it is happening- take your child(ren) to a therapist immediately. They need to be able to learn how to express their confusion and get support. Also this will document and clarify if your child is experiencing this. It will be useful in court should a custody battle ensue.
Good luck to you