How do I unlock The following caves on pokemon mystery dungeon 2 Explorers of darkness?

Enclosed Sea
Sky Fissure
Joy Cape
Sky Fissure
Mt. Practice
Sky Fissure

These are the ones I need to unlock. Unless they have a a different name. If so let me know, if you know how to unlock any or all of them. Please tell me!
Update: Thanks so much! Yeah, I'm past chapter 10. I beat the whole game, i want to go after all the legends now.
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