Players who preordered the games Pokémon Black and White have received the games' copies and started revealing information on Japanese forums. As such, bunch of information are currently being revealed.
Dent, Pod, and Corn
Grass, Fire, Water
Makes all Pokemon up to Level 20 obey its Trainer.
Makes every Pokémon up to Level 30 obey its Trainer.
Makes every Pokémon up to Level 40 obey its Trainer.