Azumarill's service is to handle job requests. Handing Azumarill a job request will cause him to open one of the request gates and allow the player to go on the mission. He may also inform the player about certain objectives that need to be fulfilled to go on the mission. By speaking to him after accepting a job request, the player is given the option to have Azumarill cancel the job.
If the player is in Companion (Multiplayer) Mode, Azumarill will wait for all players to accept the mission.
For more information on this Pokémon's species, see Azumarill.