Tranquill evolves into Unfezant starting at level 32.
Does Bergmite evolve
At level 42.
Get it to level 40, and then level 50+ while in the rain to evolve it again.
33
Machop evolves into Machoke at level 28.
Ducklett evolves at level 35.
Aron evolves into Lairon at level 32, then into Aggron at level 42.
It doesn't evolve normally. If you have it hold a Tyranitarite, though, it can Mega Evolve during battle.
Chimecho is unable to evolve as of Pokemon X and Y. Chimecho does evolve from a Pokemon called Chingling when it's at max happiness and during night time.
Scatterbug evolves into Spewpa starting at level 9. It will later evolve into Vivillon once it reaches level 12.
Dratini evolves into Dragonair starting at level 30 and later into Dragonite at level 55.
Espurr evolves into Meowstic starting at level 25.