While middle kid is playing a lot (18 yr old) and she encouraged her older sister (20 yr old) to download the game, I expect the initial fascination with the game to die down. Youngest (11 yr old) has an older phone that will not support the game.

My older two watched a lot of the first few seasons of the show, so they recall a fair amount about the Pokemon, but DH and I are more freaked out by something else - how much we remember. Older two were 2 and 4 when the show started, and we watched those initial seasons over and over again on VHS tapes. The repetition must have worked that Pokemon "knowledge" into our long term memory, because we recall the evolution of various Pokemon better than the 18 year old.