A pair of Team Magma Grunts are guarding the cable car station, so no one can reach the summit of Mt. Chimney right now. In addition, the elevated terrain makes westward travel impossible, so the only other way forward is a steamy tunnel through the mountainside.
The sweltering Fiery Path, a passage that leads through the base of Mt. Chimney, is filled with Pokémon that thrive in the heat. The main passage leads to the north side of Route 112, while a pair of boulders prevent anyone from exploring the oppressive side tunnels for now.
As you proceed northward, you find a boy staring at a large tree. Speak to him, and he explains that he is considering using a certain move to create a room for himself inside the tree. He gives you TM43 (Secret Power) so that you can establish your own Secret Base in any of the suspicious-looking trees, wall markings, and clumps of grass scattered across the region. A Trainer can decorate their Secret Base as they wish, and can display up to 16 decorations.
The Glass Workshop stands near the route's west end. Step inside and talk to the owner to receive a free Soot Sack, which can be used to collect ash by running through ash-covered tall grass. The amount of ash collected is determined by the number of steps you've walked through ash-covered grass. The constantly-falling ash replenishes these piles whenever you return to the area.
Speak with the workshop owner to learn how much ash you've collected. By providing him with the correct amounts, he is able to create valuable glass items.
Inside the Pokémon Center, you find the PC in use by a woman named Lanette. She upgraded the previous version of the Pokémon Storage System, adding a user-friendly graphical interface, the ability to store over 400 Pokémon, and the ability to change the wallpaper of each Box. As she leaves, she invites you to visit her home on Route 114.
There is a girl inside the Poké Mart, examining the merchandise displayed on the rear wall. Speak to her, and she offers to teach the move Metronome to a Pokémon, one time only.
The Fallarbor Battle Tent stands on the north side of town, and is the third of three scattered throughout Hoenn. At this location, challengers select three of their Pokémon to battle three opposing Trainers. These Trainers' Pokémon will either be level 30, or match the highest-leveled Pokémon in your party, whichever is higher. Each separate Pokémon face-off has a three-turn limit. If neither Pokémon has been knocked out in that time, the judge makes a ruling that depends on three factors: Mind, the amount of offensive moves; Skill, the accuracy of moves; and Body, the remaining HP. Possible scores for each category include Circle (a win, 2 points), Triangle (a tie, 1 point), and X (a loss, 0 points). The Pokémon that earns the most points wins. The reward for winning three consecutive battles here is a Hyper Potion.
Scott can be found inside the entry hall. He is impressed that you've stopped by, as most people around here are easygoing and laid-back, and urges you to make a challenge.
The Move Maniac lives in the northwest house. This helpful guy knows every move a Pokémon can learn as it grows, and is able to teach forgotten moves to any Pokémon, for a price. He charges a single Heart Scale for each move relearned. While a few can be found on the beach as invisible items right now, you will need to wait until you encounter wild Luvdisc later on to be able to collect a more steady supply.
The Fossil Maniac's house stands on the outskirts of Fallarbor Town. Head inside and talk to his little brother, who kindly gives you TM28 (Dig). When used in the field, Dig can be used while in a cave to return to the entrance. If you visit the cave at the back of the house, you will find the Fossil Maniac hard at work. He won't give up any Fossils, but hints that others may be uncovered by Route 111's raging sandstorm.
Go south across the bridge to reach Lanette's house. Inside, you find the woman struggling to organize her clutter. She is happy that you stopped by, but embarrassed by the state of her home. If you promise to keep her messiness a secret, she will give you a Lotad Doll in return.