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. :)
He evolves at lv 18
Marill evolves into Azumarill at level 18.
You level him up one more time then he will evolve!
Azurill evolves into Marill at level 12 in Pokemon Indigo/UnovaRPG.
you evolve a marill into azumarill
Marill doesn't learn surf naturally; must use hm
Marill will evolve to Azumarill at level 18
Marill does not need a evolutionary stone to evolve into Azumarill. Marill will naturally evolve into Azumarill at level 18.
Marill evolves into Azumarill at level 18.
level 18
Marill evolves into Azumarill at level 18.
Marill evolves into azumarill at level 18
Marill evolves at level 18
level 18
Marill evolves into Azumarill at level 18.
Marill needs to be level 18 to evolve into Azumarill unless holding everstone.
level 18
Level 25.