If you own Palico Paintballs (Blue-violet Paintballs), then fulfilling the following conditions will let your Palico automatically use Palico Paintballs to mark monsters:

• "Adventure Sync" is enabled.

• Walk a certain distance.

Please see details of Adventure Sync settings in this article.

Please note the following:

• The strength of the monster that gets marked is decided at random.
  

• Any unused Palico Paintballs will not carry over to the following day.
  

• If GPS usage is restricted on your device or communication line, such as power-saving mode or bandwidth limitation, your Palico may not be able to mark even if "Adventure sync" is turned on.
  

• (11/6 updated at the forum Known Issues article)While hunting a Large monster on the field, Palico may mark that monster, and as a result, the same monster on the Paintball List disappears upon successful hunt. Currently, this is a phenomenon that can occur based on the design, but we are actively exploring potential improvements.