Mount silver, or the elite four (With exp share.)
Dragonair evolves at level 55 into dragonite, a dragon/fighting type. A good place to train your dragonair would be the elite four. Hope I helped!
find a place that has wild Pokemon the same level as it.
At level 45 or 55 depending on how you got your dratini at the first place...Kulwinder Singh!
Dragonitis are in the dragons den. Catch one and evolve it. personally i dont think it is worth it after he is not traded and can't evolve into Dragonite.at level 55, dragonair turns into dragoniteand you need to evolve dratini for dragonite to get dratini after u cleared the test with clares papa you go back to the dragon's den and he will give u level 15 dratini.To get a Dragonair, you must catch a Dratini. They can be found in the waters of the Dragon's Den or by fishing in the ponds south of Blackthorn City. The easiest place to find one by my experience is in the Dragon's Den though. Dratini evolves into Dragonair at level 30 and then into Dragonite at level 55.
First you have to play the casino/games place in goldenrod city (where you battle whitney) and earn game points by playing voltorb. Once you get enough points you can redeem them for a dragonair. Hope it helps. P.S. the games place is not inside the gym.
Island seven.
A good place would be 7 island.
A good place to level up higher leveled Pokemon is through gym leader rematches.
train it at the Pokemon league
I would reccomed Viridian Forest and Mt. Silver. In Viridian Forest, the wild Pokemon are level 3-5, but the trainers have Pokemon between level 39-45. Mt. Silver has wild Pokemon from level 38-50.
the elite 4
you can't...