Actually, there are many ways. But first, you have to save the world 1 time (Beat Dialga). Other extra dungeons may require you save the world a SECOND time (Beat Darkrai). Every extra dungeon has its certain requirements. For example, to unlock the dungeon "Landslide Cave", you have to recycle 3 times at the Spinda Cafe'. Some also require making drinks at Spinda's Juice Bar, like the dungeons "Lush Prairie" and "Serenity River". Other extra dungeons may require things like a certain rank, Graduating the Guild, having "secret rank", receiving a job or challenge at the Cafe', and finding a job offer at the Guild that reveals the mystery dungeon's location for you.
You have to beat chapter 13
You don't unlock dungeons. Well, not in Explorers of Time and Darkness and Sky. I don't think you can on Red and Blue Rescue team either. You just buy them. And whaddaya mean, where are the dungeons????????? I have no idea whatsoever.
There is not code. You have to get them in dungeons.
yes
In Pokemon mystery dungeons explorers of sky the regis are in watchman cave
Darkri
8000
In dungeons and buy from kekleon shop
chocolate= game curruption:)
It is sometimes found in Kecleon Shops in dungeons.
sky peak sky tower beach cave amp plains and mount bristle
Get the flower and use it on Shaymin to change forme.