The Old Costume was a part of a December 2005 Account Upgrade and was retired, but Ian had made it available again through Smuggling for a 400 Dukka Coin. If you put this on your pet, they will become Old! Old pets are gray, brown and sometimes blue and have elderly people's accessories (hat, rags, glasses, scarf, and walker). This is like the Get Off My Lawn Paint Brush over at Neopets.
Ball of Old YarnEdit
The only minipet that can be Old as of now is a Silkie.