The advice previously given to you about Pokemon was good and
timely - and so right. .. I do know of others who have had
similar experiences with this game.
The books I mentioned covered all that too - in the steps to
freedom: getting rid of such things from one's home. A
Non-Christian spiritual checklist covers lots of other things as
well, of course..... such as participation in Ouija boards,
spells and curses, spirit guides, tarot cards, palm reading,
Dungeons and Dragons (and similar games), superstitutions, New
Age things, suspect movies, TV shows, music (that glorifies the
enemy) . . . to name just a few.. . and since the books were
written, there will be lots more to be added to the list!
It is easy for people to get caught, unsuspectingly, with
the more subtle things.
God Bless you and your son.