Successfully complete the indicated task to unlock the corresponding costume:

Gaara's later costume: Successfully complete "Gaara Returns" in Flashback 
Mission: Sasuke Chase Arc. 
Kankuro's later costume: Successfully complete "Gaara Returns" in Flashback 
Mission: Sasuke Chase Arc. 
Sasuke Uchiha's black costume: Successfully complete "Sasuke and Gaara" in 
Flashback Mission: Leaf Destruction Arc. 
Shikamaru Nara's Chunin costume: Successfully complete "Shikamaru's Squad Is 
Summoned" in Flashback Mission: Sasuke Chase Arc. 
Temari's later costume: Successfully complete "Gaara Returns" in Flashback 
Mission: Sasuke Chase Arc.