In Arc Rise Fantasia for the Wii, there are several outfits you can unlock by doing various tasks.
Adele’s Unlockable Outfits
Class Leader – Talk to the Apprentice Kopin in Kopin Village
Dark Nightgown – Stay at the Finite Sparkle Inn at Antrax Parish
Polka-dot – After the boss battle at Mandelro Coast, go talk to the Kopin on the ship
Alf’s Unlockable Outfits
Cocoa Swimsuit – After the boss battle at Mandelro Coast, go talk to the Kopin on the ship
Cotton Pajamas – Stay at the Finite Sparkle Inn at Antrax Parish
School Leader – Talk to the World-viewing Kopin in Kopin Village
L’Arc’s Unlockable Outfits
Blue Swimsuit – After the boss battle at Mandelro Coast, go talk to the Kopin on the ship
Tank Top – Stay at the Finite Sparkle Inn at Antrax Parish
Leslie’s Unlockable Outfits
Tropical Swimsuit – After Leslie joins the group, talk to the Kopin on the ship
Niko’s Unlockable Outfits
Retro Swimsuit – After the boss battle at Mandelro Coast, go talk to the Kopin on the ship
Ryfia’s Unlockable Outfits
Iris Nightgown – Stay at the Finite Sparkle Inn at Antrax Parish
White One-piece – After the boss battle at Mandelro Coast, go talk to the Kopin on the ship