The Firework Costume is a retired costume first introduced in January 2011 in its own Account Upgrade as black goo; it has been neglected ever since. A new version of the Firework Account Upgrade has been released in January 2018 with 8 new firework themed items and either a Firework Sindi or Doyle Enchanted Plushie. This AU retired on February 20th. Putting this costume on your pet will make it turn black with yellow fireworks on it and fireworks spewing behind it. Old pets appear to have their hands up like it's Turaco's Temptations; their "pants" are in the shape of skyscrapers.