Pokémon Mystery Dungeon: Blue Rescue Team and Red Rescue Team/Uproar Forest

Once you reach the 10th floor you will find the Mankey gang. Afterwards everyone will return to your rescue team's headquarters. The Mankeys will help upgrade your teams HQ in exchange for a spiky chestnut. A total of 2 chestnuts will be required to advance in the storyline. If you don't have enough to bribe the Mankeys go for a few more missions in Uproar Forest until you have found some.

Go to the bulletin and take the Smeargle's mission.

In The Dungeon
This is the first dungeon to have the possibility of Monster House.

Items

 * Chestnuts Can be found randomly on the 9th floor only

Enemies
Mankeys will not be able to be recruited until after the first completion of the dungeon.

The Last Floor
Smeargle is on floor 15. After finding him you will return home and Smeargle will now join you. Once Smeargle is on your rescue team you can talk to him to change the design on the flag at your HQ.