My childhood game was Pokemon, more specifically, LeafGreen and Emerald versions. Those were my first console video games, and, really, my first video games in general. While I am only just now learning about the strategy involved in the games, they still provided me hundreds of hours of entertainment when I was younger, and probably will provide me just as much, if not more, in the future. Currently, I'm planning out various teams, each designed to beat a specific facility at the Battle Frontier.
Surprisingly, I still have my first save files for both of those games, though I am also about the restart them. For fun, of course.