The residents of Fortree City live in treehouses and get around by a system of rope bridges that hang in the treetops. Due to the physical exertion needed for such a lifestyle, they are all healthy and fit, and by preserving Fortree's natural environment they are able to live nearer to wild Pokémon than the residents of most other cities. Wild Bug-type Pokémon often fly in through the windows, and from time to time wild Kecleon will block paths in the city. The heavy rainfall saturates the soil and lets the trees grow tall.
The treetop city that frolics with nature. (Japanese: きの うえで しぜんと たわむれる まちThe treetop city that frolics with nature.)
Places of interest
A woman in one of the houses of Fortree City will give away TM10 (Hidden Power) if the player can guess which hand she is hiding a coin in three times. Also in Pokémon Emerald, in this same house there is an old man who will teach a compatible Pokémon Sleep Talk one time only.
In Pokémon Ruby, Sapphire, and Emerald, there is a shop in the southeastern corner of Fortree City that sells a variety of Secret Base decorations. There are two counters, the one on the left is selling desks and the one on the right is selling chairs.
In Pokémon Omega Ruby and Alpha Sapphire, the Secret Base decoration shop is replaced with the Secret Base Guild. This is where the player can meet and battle Aarune, and also serves as a place to buy Secret Base decorations from. Some items are only available after the player has achieved a certain rank for their Secret Base team.
The Gym Leaders discussed both Team Magma and Team Aqua; after an argument, they decide to take sides. Norman refused to support either team and left the meeting. Sapphire then arrived at Fortree to challenge Winona to a battle, but lost, though Sapphire managed to convince Winona to coach her afterwards.
Once Wallace arrived at Fortree in person, the first meeting was disbanded, although the leaders stayed at Fortree to monitor the situation. That night, a dejected Ruby, who had arrived at Fortree with Wallace but fell out with Sapphire later during the day, left the city, and Wallace had to chase after him. A tsunami then washed up on the shores of southern Hoenn, flooding Slateport, Dewford and Littleroot. Before Brawly could respond to the emergency in his town, the Gym Leaders were alerted to another energy source causing a drought which had affected Fortree. Thus, it was agreed that Roxanne and Brawly targeted the source of the drought while Wattson and Flannery targeted the source of the tsunami. Winona agreed to find the boundary where the energy sources clashed, and took Sapphire with her.