Marill evolves into Azumarill at level 18.
you evolve a marill into azumarill
Marill is the evolved form of Azurill. Marill can evolve into azumarill. HOW TO EVOLVE MARILLUTIONS: make azurill happy, MARILL! Lv. 28 (i think)marill.. AZUMARILL!! ^^^^^^^^^^ made that up!
Azumarril
level 18
Marill evolves into Azumarill at Lv 18.
Azurill > Happiness > Marill > lvl 18 > Azumarill
Marill evolves into azumarill at level 18
Marill evolves into Azumarill at level 18.
Marill evolves at level 18
Level 18
A Level 25 Marill can still evolve into Azumarill even despite the fact that Marill evolves into Azumarill at Level 18, all you have to do is level it up and it'll evolve into Azumarill as long as it isn't holding an Everstone.
On Pokemon Platinum and Diamond versions, Marill evovles at level 21 into Azumarill. I'm not sure what level on Pearl.I know because I have both versions. :)