The one i always id as my favorites are Gold/Silver cause its probably the entries that left the bigger impression on me, even more so than Red/Blue, but a case can be made for X/Y cause thats the gen ive played the most and its not even close, for many of the reasons Zuzek brings up that I guess theres no point in repeating, but also because its the most PVP oriented ive ever played, this franchise benefits immensely when they make it friendly for players who enjoy competitive play and back then we had free online (godly Nds/3ds times).
The criticism it gets about bland story/characters means nothing to me, cause you can literally say that for every entry and itd be true every time.







