POKEMON MYSTERY DUNGEON: RED RESCUE TEAM UNLOCKABLES
Buried Relic
Clear Stormy Sea, read newsletter, go to Pokemon square then talk to Lombre then to Shiftry for access.
Darknight Relic
Purchase the 'Secretive Forest' friend area from Wigglytuff. (15 floors)
Desert Region
After you beat the game and the credits roll
Fiery Field(Entei)
Obtain Hm Surf from the Solar Cave. Spinda will then visit and tell you about a mirage Pokemon. You can now go to Fiery Field.
Grand Sea
Purchase the 'Serene Sea' friend area from Wigglytuff.(30 floors, Dive needed to enter)
Howling Forest
Get the friend area 'Sky Blue Plains'.There will be a request on the rescue board by a Smeargle. (15 floors)
Joyous Tower
Unlocked after completing Pitfall Valley
Lightning Field(Raikou)
Finish Fiery Field.
Meteor Cave
Recruit Lugia in Silver Trench, then a event will trigger opening this dungeon
Mt. Faraway(Ho-oh)
Finish Northwind Field.