My very first pokemon game was Diamond. I still remember, that when I was a kid, I saw other children playing their pokemon games on their gameboy color, but all I could do was watch them playing. My parents and grandparents didn't allow me to get one for myself, all I was allowed to play were harmless games for little girls. Pokemon was way too brutally in their eyes. Oddly enough my parents didn't have anything against me watching the anime, but until I came home from school and finished my homework (first work, then play) in most cases the anime was already over for the day, so I seldomly had the chance to watch it.
Well, by the time I got older, my parents (and grandparents) grew less strict with me and when I was around 12 years old, my parents took me with them shopping to finally buy me my very own pokemon game. At that time I still didn't knew much about the different editions and already existing generations, I just wanted a pokemon game. And the only ones avaible in the shop were Diamond and Pearl. Since I didn't knew anything at all about the new games, I chose my copy merely based on appearances.
I still know how it felt, when I encountered entirely new pokemon in the wild and how exited I was, when my pokemon evolved, since I still didn't knew how their evolutions would look like.
Until this day, these are very special memories to me.