Complete the indicated task to unlock the corresponding map.

Map	How to unlock
Beautiful Beach	Get 200 Watts.
Beyond The Sea	Trade for an International Pokemon in the GTS in Goldenrod City.
Big Forest	Get 40,000 Watts and own the National Dex.
Blue Lake	Get 2,000 Watts.
Dim Cave	Get 1,000 Watts.
Hoenn Field	Get 5,000 Watts and own the National Dex.
Icy Mountain Rd.	Get 30,000 Watts and own the National Dex.
Night Sky's Edge	Trade a fateful-encounter Jirachi onto Pokemon HeartGold or SoulSilver.
Noisy Forest	Available by default.
Quiet Cave	Get 100,000 Watts and own the National Dex.
Rally	Participated in the Wi-Fi Event during January 29th through February 28th, 2010 in Japan.
Refreshing Field	Available by default.
Resort	Get 80,000 Watts and own the National Dex.
Rugged Road	Get 50 Watts.
Scary Cave	Get 20,000 Watts and own the National Dex.
Sightseeing	Participated in the Wi-Fi Event during November 14th, 2009 through to January 11th, 2010 in Japan' and from April 17th to May 31st, 2010 in Korea.
Sinnoh Field	Get 25,000 Watts and own the National Dex.
Stormy Beach	Get 65,000 Watts and own the National Dex.
Suburban Area	Get 500 Watts.
The Resort	Get 80,000 Watts and own the National Dex.
Town Outskirts	Get 3,000 Watts.
Tree House	Get 15,000 Watts and own the National Dex.
Volcano Path	Get 10,000 Watts and own the National Dex.
Warm Beach	Get 7,500 Watts and own the National Dex.
White Lake	Get 50,000 Watts and own the National Dex.
Winner's Path	Participated in the Wi-Fi Event from May 6th to June 25th, 2010.
Yellow Forest	Participlated in the Wi-Fi Event from April 1st to May 5th, 2010.