Quoted By:
Sure, Gen VI isn't very challenging, but it's not as easy as /vp/ claims it to be as long as you turn off the Exp Share immediately. Having replayed both Blue and Black versions just a while ago, I can say without any doubt that they're both easier than XY.
Gen I is definitely the easiest game in the series because of the horrible enemy AI and ridiculously bad movesets. You can be underleveled as fuck in those game and still sweep everyone without any trouble. I mean, I beat Gen I easily as a kid without understanding anything about stats or type coverage, without grinding and without understanding English very well, so I think that's enough of proof that those game are easy as shit.
BW have the problem of giving you way too much exp compared to the low level differences of the gym leaders. I didn't grind at all after the second gym and yet my team was overleveled all the way from the third gym to the final gym, and I actually had to AVOID trainer battles so I wouldn't be too much ahead of the gym leaders. It was just fucking stupid. The only mildly challenging battles in the game are N and Ghetsis, that's it. Otherwise you can just sweep with your overleveled Mons.
In terms of difficulty, this is how I would rank the generations:
4 > 3 > 2 > 6 > 5 > 1
