>>32299561Gen 5 has always been my favorite though gen 2 gives me a bigger nostalgic feeling.
It's kinda hard to decide honestly. Both of those gens are when I had a peak interest in pokemon. I played Red but I didn't really get into pokemon until Silver came out and spent hours and countless batteries playing the shit out of that game. Then there's gen 5 that came as a breath of fresh air that rekindled my interest after skipping gen 4.