It's in a room in Victory road
Landorus, Tornadus, Thundorus. Or Cobalion, Virizion, Terrakion. Tornadus is only available in Pokemon Black and Thundorus is only available in Pokemon White. You have to trade Thundorus (Tornadus) to Pokemon Black (White) To get Landorus. You have to get Cobalion before you can get Virizion and Terrakion.
In Black and White Versions: Reshiram, Zekrom, Cobalion, Terrakion, Virizion, Kyurem.
terrakion can be found in victory road.
IN BLACK AND WHITE: Victini, Zekrom, Reshiram, Kyurem, Landorus, Thundurus, Tornadus, Cobalion, Terrakion,and Virizion IN WHITE: Victini, Zekrom, Kyurem, Landorus, Thundurus, Cobalion, Virizion, Terrakion IN BLACK: Victini, Reshiram, Kyurem, Tornadus, Cobalion, Virizion, Terrakion
Zekrom (white), Reshiram (black), Landorus, Tornadus (black), Thundurus (white), Cobalion, Virizion, Terrakion, Keldeo, Meloetta, Genesect and Kyurem.
I think the Pokemon you mean is Terrakion - which can be found in Victory Road just before the elite four. This is the same for Pokemon Black and White.
colbalion,terrakion,virizion,kyurem,tornadus,thundurus,reshiram,zekrom,volcarona landorus,
terrakion
The legendary Pokemon you can get on Pokemon white are kyurem,thunderes,zekrom,cobilion,virizion,terrakion and landouros (landourous requires tornadous from black and thundrous on white in your party
receive keldeo in black or white via mystery gift, then transfer it to black and white 2. or catch cobalion, terrakion and virizion and go to a secret place
victory road
victory road go from the back (pokemon league) and go left go inside a small cave it will be there