never
Well to me yes because if you are in the wild like Pastoria city and Enterna Forest you might be able to find an Azuril at the Great Marsh too.
capture one in the safari zone
after you visit azuril's dream then you can go to the volcano
You have to get the secret potion from Cynthia.
In the Beach Zone ,not that close to the Drifblim Stop
You don't. Breed a marill holding Sea Incense and the egg will hatch into Azurill
Azuril, Plusle and Minun
You find an Espeon in Azuril's Nightmare. But, if you want one on your team, you evolve Evee.
breed a marill and azmumarill while it's holding sea incense. the egg will hatch into a azuril
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.
after you find and lose manaphy, help team charm, and do several more missions
You get a male and female Marill give one of them sea inscense and bring them to the daycare go get the egg and hatch it. It will be an Azurill.