Instructions
Transfer the Dragonair into your "Pokemon Sapphire" game, if you don't already have one on your team. Dragonair cannot be caught in this game, only transferred from "FireRed" or "LeafGreen."
Place Dragonair as your primary team member. Fight battles against wild Pokemon to gain experience points. Avoid fighting with other dragons and ice-type Pokemon. Train against fire-, electric-, grass- and ice-type Pokemon, if possible. Their attacks do only half-damage.
Level up when Dragonair gets enough experience points. For each level it gains, it needs to earn increasingly more experience points to level up again. Dragonair evolves into Dragonite automatically when it reaches level 55.