>>30862366http://www.serebii.net/black2white2/blackcitywhiteforest.shtmlA better explanation than I can give, but its more like a bonus dungeon than anything. You still get exp for your team but you'll need it because the enemy levels continue to scale all the way up; the bosses at the end are around level 80 or so and pretty decent fights.
Pokewood is the movie star side game; effectively it works like a puzzle game, where you need to use pokemon moves and type match ups to meet certain conditions to get the endings you want for the movies. Probably the biggest downfall in it is A) the forced tutorial at the beginning and B) the fact that you have to clear a movie with rental pokemon that can get you the "right" ending before using your own pokemon and going for the weird endings. I really enjoyed it, though you'll probably need a guide to meet some of the requirements.
BW2 also has the waifu sidequest 