For me It has to be megaman 3. Mostly because it was one of the first games i had ever played. Also because it's soundtrack is EPIC!!!! another one is pokemon pearl becasue it is the first pokemon game i ever beat.
I could've got any plushie i wanted except for best pony when we went to gamestop... GAMESTOP HAD MLP PLUSHIES!!!!!! AND THEY DIDN'T HAVE BEST PONY!!!!!!!!!!