Materials are the currency used in the Pony Editor to make outfits. You can pay 5 to get 3 , or watch an advertisement to receive 1 , and sometimes there is events where you can get a set amount of materials. You can see the materials and how much you need for the outfits.
As of Update 4.2 on February 9th 2018, leveling up a character to 5 stars gives rewards among which are the Materials.
|Material||Type||Twilight Sparkle||Pinkie Pie||Rarity||Applejack||Fluttershy||Rainbow Dash|
Exclusive Nightmare Night Costumes
These Characters only appear in the Pony Editor if a Costume piece has been purchased for them to wear. You are only able to purchase the Costume Pieces during the Week of Nightmare night at the end of October.
|Material||Type||Applebloom||Big Mac||Scootaloo||Sweetie Belle||Granny Smith|
The Grand total of materials needed to complete the Regular costumes and the Nightmare Night costumes.
|Material||Type||Total Needed for All Outfits|