Fortree City is located in the north of Hoenn. This city is unique in that all the buildings, apart from the Pokémon Centre, PokéMart and Gym are treehouses sitting above a massive forest. There's not much of note here, but there is a store which will sell you various Secret Base items.

Move Tutor
In one of the houses of the city, an old man will be willing to teach you Sleep Talk. This move is free but can only be taught once.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Sleep Talk			10	--	--	While it is asleep, the user randomly uses one of the moves it knows.

Gym
The Fortree Gym has got a unique puzzle where you have to rotate various gates around trainers in order to pass through. Once you reach the end, you will encounter the Flying-type Gym Leader, Winona and when defeated, you will earn the Feather Badge and TM40, Aerial Ace