What level does azurill evolve?
Azuril evolves when friendship is high enough, and Marill
evolves at Lv 20 to Azumarill. You catch Azuril in Trophy Garden
after getting the national pokedex. Talk to Mr Backlot and tell him
you will survey him. He will tell you a special Pokemon in the
garden. To catch Marill, go to Route 215.