WaterFarmingWater plants, fill pools, and activate water-powered items. Essential for farming and gardens.
Piplup waters crops, cleans terrain, and helps plants thrive.
Build a Hydrated Yellow Tall Grass habitat to attract Piplup. Once it arrives, Piplup can water crops and help plants thrive.
Hype 
Trade 
You'll keep Piplup happy with lots of water and nice breezes. It also loves sweet food, so cook a few sweet dishes when you can. Check its mood at the Pokemon Center.
Wash the mud
Given by: Meowth
Use Piplup bubbles and Water Gun to wash mud in front of Meowth's house
Comfort increaseCreate Trash Collection Site
Given by: Piplup
Create habitat to befriend Trubbish, convert garbage to Iron Ore
Shower recipeLet's swim together
Given by: Piplup
Create Tropical Seaside habitat, befriend Lapras, wash 80 squares of mud
Surf moveFollow Piplup swimming
Given by: Piplup
Transform into Lapras and follow Piplup while swimming
Comfort increase
Yawn
Fly