Why would Satan influence a game like Pokemon? Well for one it opens up players to the demonic realm of channelling (a power some of the Pokemon characters have) and possession. Pokemon is not the enemy - Satan is. Pokemon is a tool the enemy can use to build a false foundation and plant seeds of deception in a child.
As Christians we are aware of the ‘big’ evil things in our world like violence, drugs etc. but we can become a little oblivious to the fact that Satan will also use ‘good’ things like education, music, sport and hobbies to take our hearts off of God. Children brought up in Christian homes are a prime target by the devil who is using fads and entertainment to get their minds off God and onto worldly and even Satanic activities.
“The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons. Such teachings come through hypocritical liars, whose consciences have been seared as with a hot iron.” 1 Timothy 4:1
Some Christian authors are telling parents “even though there is a little evil, it’s OK” A game that even hints at occultic practice is dangerous! We are to flee the appearance of evil. We need to be aware of what we are allowing our children to be exposed to.