That depends on your definition of powerful.
ice and dragon
Kyurem is a dragon ice Pokemon in the game Pokemon Black and White. It has the pressure ability and does not evolve.
The legendaries are: The lightning dragon Zekrom (white only) The fire dragon Reshiram (black only) The speedy storm Pokemon Thundurus (white only) The fast hurricane Pokemon Tornadus (black only) The victory Pokemon Victini (event Pokemon) The melody Pokemon Meloetta (event Pokemon) The honour Pokemon Landorus (requires trading) Cobalion, leader of the musketeer quartet Virizion, the elegant grass Pokemon Terakion, the strong, powerful stone Pokemon Keldeo, the young, brave water Pokemon (event Pokemon) The ice dragon Kyurem The ancient hunter Genesect (event only) And that's the lot!!!
Ghetis
So far, he hasn't. Check Bulbapedia for anything in Pokemon that changes frequently.
The most powerful dragon move is roar of time which can only be learned by dialga. otherwise it's Draco meteor
The most powerful dragon that is not a legendary or pure dragon in Pokemon is Dragonite. It is a flying dragon that has balanced stats and is extremely strong
The legendary mascots for Pokemon Black is Reshiram the white dragon one. Pokemon White is Zekrom the black dragon one.
Zekrom (the black dragon) is found in Pokemon White.
ice and dragon
what is dragon
Dragonair
Give it Red eyes and some metal yeah red eyes black metal dragon is pretty powerful
go to dragon spiral tower, and catch a druddigon
in my opinon garchomp
There was only one family of dragon types so its dragonite
Kyurem is a dragon ice Pokemon in the game Pokemon Black and White. It has the pressure ability and does not evolve.