Quoted By:
>Kanto
Rock Tunnel. Needs flash and feels a tad bit too long.
>Johto
The route east of Mahogany town. Immediately, every playthrough, I lose interest on this route. The same can be said for the route south of Blackthorn. As for blackthorn itself, Clair is interesting enough to keep my interest.
>Hoenn
I like many others am no fan of the infamous water routes. Never have been. Aside from those, I tend to take a hit of boredom when I reach route 118, but since 119 is so damn good I usually get to Fortree, and then 120 and 121 take a lot of willpower to get through. That combined with the proceeding water routes usually kills most of my playthroughs.
>Sinnoh
Honestly can't think of a single spot. Victory road
>Unova
Everything between Twist mountain and the final battle feel annoying due to all of the story stuff going on, really slows that part down. The final battle is well done tho so its not that bad.
For BW2 though, everything before Castelia really slows me down. I love Virbank, but theres just so much slow shit you have to plow through in such a condensed amount of time. Also, Imo everything after the Volcano feels kinda empty and at times pointless. Those routes to me have always felt that way, despite Unova being one of my most played games and favorite regions. The routes around Humilau city feel very rushed and cramped, oftentimes confusing to me. Once I beat Drayden, the poorly made final routes combined with the very rushed Team Plasma finale and even the final route just murder my ass. And compared to the ending in bw1, fighting Iris just feels entirely meaningless.
>Kalos
The desert route is always a pain in the ass. Plus it always pissed me off how theres a full on desert right next to a major urban center, flanked by forests. The other weak parts of Kalos IMO are basically everything past the fairy gym feels weak and uninteresting, except for the weird forest area and Pokemon sanctuary.