As you leave Nimbasa, Bianca catches up to you. She gives you HM02 (Fly), which lets you instantly return to any familiar city or town. Use it on something like Pidove or Sigilyph.
Hidden Grottoes Revealed
After handing over the HM, Bianca claims that she hears something. She leads you north, where she hears a rustling in the trees. She explains that this must be a Hidden Grotto, one of many scattered across the region. These grottoes are hard to find, they simply look like a large shadow under a group of trees. Inside, you can meet a Pokémon with its Hidden Ability, a visible item, or a hidden item. After a while, another Pokémon may show up, or another item may appear. This grotto happens to have a Minccino inside, which has its Hidden Ability Skill Link. Bianca leaves you to catch it, or not, on your own.
The Maid inside the trailer is trying to cook a meal, but is looking for more ingredients. If you give her any edible item, like Berry Juice or Casteliacone, she will pay for your generosity. The items she receives are worth anywhere from 20 to 30,000.
A large crowd is gathered on the west side of the route. The drawbridge is blocked by a Motorcyclist, his name... Charles. A male Ace Trainer asks for help, so get ready to battle. Charles challenges you to a Rotation BattleB2 or a Triple BattleW2, so check the order of your party members.
The crowd disperses when Charles is defeated, and you can proceed west over the drawbridge.
The Driftveil Drawbridge
The Driftveil Drawbridge is managed by the Driftveil Gym Leader, and is raised and lowered to accommodate the city's shipping schedule. Bird Pokémon frequently fly over the bridge, and may drop a few feathers. All but one of the seven varieties can be used to raise a Pokémon's Effort values. Most of these can also be sold for 1500, making them a handy source of quick cash. Sometimes Ducklett may rest on the bridge, as well.
By talking to the man on the east end of the bridge, the Funfest MissionWings Falling on the Drawbridge will be added.
The Youngster's Wish
In the center of the bridge stands a Youngster. He would like to see a Charizard, for which the bridge is nicknamed. If you speak to him with one in your party, he hands over a Heal Powder as thanks.
Driftveil City is a major port city that distributes a large variety of goods. The Driftveil Market sells items found nowhere else in Unova. The city was developed considerably over the last two years, and is now filled with many hotels. In the northwest, construction has begun on Clay Tunnel, a shortcut to Twist Mountain, which is still ongoing.
On your way into the city, you meet a former member of Team Plasma arguing with a current member, who is trying to convince his friend to rejoin the group. He refuses, saying that it will make his lord N sad. The current member laughs, calling the team's former "king" a traitor who disappeared when they needed him. Hugh arrives suddenly and the current member runs off, with Hugh not far behind. The former member invites you to hear more of their history at their old base, west of the Gym.
Grand Hotel Driftveil stands near the stone bridge. Speak to the old man on the first floor; if you have seen at least 70 different Pokémon, he rewards you with a Shell Bell. After that, take the elevator to 19F and play with the Axew to receive the Haban Berry it was holding.
Driftveil Luxury Suites sits in the southwest. On the first floor, a Lady asks to see a Pokémon with a certain move; fulfill her request to receive a Heart Scale. She asks to see a new move every day. On 23F, a Waiter gives you an Everstone.
The Driftveil Continental Hotel is located in the northeast part of the city. Talk to the Veteran on 25F to receive a Big Root.
The Chateau Hotel can be found north of the Market. On the first floor, you meet a master Move Tutor who is interested in Red Shards. Give him a certain number of them to have him teach a Pokémon a new move. On 25F, a Gentleman gives you an Air Balloon.
The house next to the Chateau Hotel belongs to the local Move Tutor. He is obsessed with Red Shards, and will teach a variety of moves for the right number of Shards. The Driftveil Gym's weaknesses include Ice- and Grass-type attacks, so you may want to have him teach Ice Punch or Seed Bomb.
Afterwards, Hugh shows up and Rood leads you both into the building. Rood explains how he and the other former Plasma members are repenting for their misdeeds from two years ago. Hugh asks where is his sister's missing purrloin but Rood suggests that Team Plasma is still using it. Hugh now leaves to defeat the Pokemon Gym. Rood then asks you to look after a Pokémon for him, a Zorua that once traveled with N.
Driftveil City Pokémon Gym Leader: Clay The Underground Boss
The Driftveil Gym specializes in Ground-type Pokémon. In keeping with his Miner King title, Clay has established his Gym in a large underground cavern littered with green crystals. To reach the Gym Leader in the northeast, challengers must navigate a series of conveyor belts through the shadowy chamber. A spotlight snaps on over each platform you visit, and there are four platforms that function as lifts so you can get a better view of your surroundings.
For defeating him, Clay awards you the Quake Badge, which ensures that all Pokémon of level 60 or less obey. He also gives you TM78 (Bulldoze) as a prize.
Clay then leads you out of the Gym, where you meet up with Hugh again. Clay invites the two of you to the Pokémon World Tournament located south of the city. Hugh rages against Clay for letting former members of Team Plasma live in his city; while Clay tries to calm him down, Hugh does not seem convinced and runs off to the south. Follow him to the World Tournament area.