The Mosswater Factory is a factory in the south east section of the Peridot Ward. It is a tremendously toxic facility, and one that damages the surrounding waters by dumping its wastes in Azurine Lake. It is uncovered that it is a base for Team Meteor.
North East of Mosswater Factory is a Hotshot defeat him and he will grant you access to another alleyway where you can find more trainers and Pokémon.
The Blacksteam Factory is a factory in the Western most section of the Peridot Ward. It is a tremendously toxic facility, and one that damages the surrounding waters by dumping its wastes in Azurine Lake. It also serves as a base for Team Meteor.
During clear or sunny weather, a Budew will be walking on top of the wall near the Tourmaline Desert gate. If you have a Rose Incense, the Budew will catch the scent and leap off to join you. The Budew will have a Sweet Co. OT which means it will gain boosted experience gain.
During rainy or stormy weather, interact with the fountain and a Surskit will attack you can fight and catch it.
After talking to the woman inside the house north west of the fountain and listening to her fear over kidnappings, go to the building next to the alleyway which was formerly empty, there you will find two suspicious people discussing plans for liberating a Pokémon, they will flee upon discovering the player eavesdropping. Return to the woman's house, where the duo is attempting to take the woman's Igglybuff. When you interrupt them, they recite an anthem detailing their motives and then attack. After defeating them the duo will flee, but the woman is still extremely frightened by their intrusion, she begs the player to take her Igglybuff to insure it's safety. The Igglybuff obtained can have Wish, Perish Song or Misty Terrain. Returning the Igglybuff later in the game will earn you some rewards.
At night, the apartment building north of Mosswater Factory will be having a problem with a power outage. On the right side inside of this house there will be a Pokémon that is causing problems; a Joltik/Grubbin. If the player has a PokeSnax in a bag, they can battle and capture it. These Pokémon cannot be obtained after beating Corey's Gym.
The girl first seen in front of the Grand Hall is still struggling with her disobedient Stufful/Snubbull in the northwest-most apartment building. After acquiring two badges, she offers the Pokémon to the player. Snubbull will come with either Heal Bell or Close Combat in its move-set where as Stufful can come with Thunder Punch, Ice Punch or Stomping Tantrum.
In the house directly east of Mosswater Factory there is a Street Rat wanting to trade his Munna for a Bibarel. This trade cannot be done after you enter the Agate City checkpoint.
To the left of the Tourmaline Gate is the thief who stole your Pokémon purchased at the Grand Hall. Upon confronting him, he demands 500 before giving it back. Paying this amount results in him revealing that he and the fisherman that sold the Pokémon actually worked together to scam unsuspecting trainers, he then dares you to defeat them to retrieve your purchase. After beating them, the street rat admits that a kid stole it from him on his way home, so he can't give it back.