Dratini evolves at level 30, into a Dragonair.
Dragonair evolves at level 55, into Dragonite.
if you mean drantini there's a waterfall in mt cornet look at a map of mt cornet and go to the waterfall then keep fishing into the water fall and you should get one (if you want to evolve it, it evolves at level 30 into a dragonair then at level 55 it evolves into dragonite)
Dragons Den.
It is suppose to evolve at the Level of 20,but if you want it to evolve later it can evolve anything after it is at Level 20.
It will evolve by level. Teddiursa will evolve into a Ursaring at level 30.
They evolve at level 36
It will evolve at level 36.
They evolve on level 40
it evolve on level on 64
if you dont let it evolve at the required level of level 20. itll try to evolve at every level following.
Pikachu do not evolve by level. They evolve when a thunderstone is used on them.
To evolve a Sandshrew level it up to Level 22 and it will evolve into Sandslash.
Kricketune does not evolve, but a Kricketot will evolve into Kricketune at level 13.