My sister is now 7 and she picked up Pokemon XY when she was 6 or so and she hes completly hooked, she has played crystal till red, and is now playing emerald, but she prefers to watch the anime, she is about to see Ash enter the hoenn league or something, i think that at one point she saw more than 100episodes in 2 weeks.
This is her favorite song from the games idk why
https://www.youtube.com/watch?v=Mx7XHQSEKDs 
