Pokémon Dream Radar is best known for its legendary Pokémon: the three Forces of Nature in their Therian Forme, which can’t be found anywhere else in Black 2 and White 2, followed by five fourth-generation legendaries. Here is how to get them, based on Poképédia.

Capturing Tornadus.

The Forces of Nature, Therian Forme

PokémonRefinerConditionAbility
TornadusMiracle α400 Dream Orbs in totalRegenerator (Therian Forme), Defiant (Incarnate Forme)
ThundurusMiracle β1,000 Dream Orbs after TornadusVolt Absorb (Therian Forme), Defiant (Incarnate Forme)
LandorusMiracle γ1,500 Dream Orbs after ThundurusIntimidate (Therian Forme), Sheer Force (Incarnate Forme)
Tornadus.
Thundurus.

Once sent to Black 2 or White 2, the Forces of Nature are unique to the version that receives them: you can’t transfer them from Black 2 to White 2, but you can send them on to later generations.

Fourth-generation legendaries

After Landorus, insert the game card from a fourth-generation game to unlock a Refiner, whatever its language and your progress.

Dialga.
Palkia.
PokémonRefinerGame cardAbility
DialgaTimeDiamondTelepathy
PalkiaSpacePearlTelepathy
GiratinaRenegadePlatinumTelepathy
Ho-OhRainbowHeartGoldRegenerator
LugiaDiveSoulSilverMultiscale