Mt. Coronet 4F (By Waterfall)http://pokemon.marriland.com/diamond_pearl/pokedex/148/
dragonair
Dragonair are found rarely at Mt. Coronet.
No.
Dragonair does not learn Dragon Rush in Pokemon Leafgreen. However, it can learn the move in Pokemon Diamond, Pearl and Platinum at level 39.
You catch it in mt cornetbut its quite rare
Dragonair evolves according to the level it reaches and once it reaches Level 55 it will start to evolve into Dragonite.
somewhere in Mount Coronet is on the 4 floor a waterfall. use the super rod and there is you're Dragonair. (5% chance)
at lvl 55dragonair evolves when he/she or he_she is level 55
Mt. Coronet you might need to use one of the fishing rods
In Pokemon diamond you can get a drattini by fishing with super rod in a lake with a waterfall in a cave on mt. stark
Dratini evolves into dragonair and dragonair evolves into dragonite
dratini evolves on 33 to dragonair then dragonair evolves on 55