Pokemon started somewhere around 1996 when I was in the 4th grade, if I'm not mistaken and I followed that serious until Pokemon Silver and Gold was released on the original Game Boy Color. After that I fell off the franchise.
Pokemon isn't a childs game unless it still has the followers from way back in 1996 but I think some people of the 1996 generation moved on and it feels more like a childs game if anything because I don't even watch the TV Show because its highly the same content over and over again and its beginning to show its age with me.
So I would go with true as Pokemon being a child's game.