Defeat Water-type Pals
Defeat Pals that drop Pal Fluid
Catch and butcher Pals that drop Pal Fluid
Check the Palpedia for drop information
Loot Pal Fluid from defeated Pal drops on the ground
Farm early-game Pals commonly known to drop Pal Fluid, such as Pengullet, Teafant, or Celaray