Whimsical Papillon appears in Chapters 5 and 6 of the Void Quest within the Midnight Channel. It will act as a support shadow for others in the group, buffing the Shadows and debuffing the party. Upon being defeated, it may drop the Shiny Scale material. Selling 6 Shiny Scales will unlock the Drunken Fist weapon for Teddie.
In Golden, it may also appear in Chapter 7. It may also drop Lemon Quartz for trade at Shiroku Pub.
Whimsical Papillons appear in the 3rd and 4th Stops of the Group Date Cafe, first as Power Spot ambushes before segueing into normal encounters. These shadows are dangerous as they are the first enemies the player encounters with access to Hama and Mudo skills.