To get this item you have to go into the shop and use the following combination:

PC: 2 2 4 4 (left click)
Xbox: → → ← ← X
Playstation: → → ← ← □

To unlock this custome you have to be in Korra's room, have the spirit korra outfit selectedand enter the following code:

PC: 1 1 3 3 (left click)
Xbox: ↑ ↑ ↓ ↓ X
Playstation: ↑ ↑ ↓ ↓ □

To get this outfit you have to be in Korra's Room, have the chi blocker outfit selected and enter the following code:

PC: 1 3 1 right click left click right click
Xbox: ↑ ↓ ↑ Y X Y
Playstation: ↑ ↓ ↑ ∆ □ ∆