It evolves at level thirty.
Dratini evolves into Dragonair, starting at level 30. Dragonair, then, evolves into Dragonite at level 55.
Level 36.
Level 30
Shiny Stone
Dratini evolves at level 30 into Dragonite.
at level 30
30 or 40
level 30
lvl 36
lvl 20
level 18
Dratini evolves at level 30 into Dragonair in Pokemon FireRed. It then evolves into Dragonite at level 55.