Level 55
No, you need to evolve a Dragonair.
You must evolve Dragonair, which you get in the Dragon's Den.
You level up a Dragonair to Level55 then - hopefully - it will evolve into a Dragonite.
You must evolve Dragonair (available from the Dragon's Den; use super rod) to get it.
dragonair will evolve at lvl 54 or 56
Dratini evolves on level 30 into dragonair.
Dratini evolves into Dragonair at level 30.
dragonite
In Pokémon HeartGold, Dragonair can primarily be found by fishing in the Dragon's Den, located behind the Blackthorn City gym. Players can also encounter Dragonair in the Safari Zone’s Wetland area, where it appears at a low encounter rate. Additionally, you can evolve a Dratini, which can be caught in the same locations, into Dragonair at level 30.
Dragonair can evolve into Dragonite by simply Leveling up to Lv.55.
yes, it evolves into dragonite at lvl 55.
It evolves into Dragonair, and dragonair evolves into dragonite