My Stepson has been playing Pokemon since he was about 15, he is now 25 year old and still plays it, he is obsessed by it, he even plays tournament that last all night.
He has grown to be a kind, very caring and very well adjusted adult.
If you are worried about bringing your child up to be well adjusted you just have to remember guidelines we all already know, e.g. our time, love, direction, society, friendship, family, education, self discipline, being a role model etc.
Then anything our children are faced with, they will be able to handle, because you are there with them.