The Lightning Costume is a retired costume that was a part of an Account Upgrade from March 2008 along with the Enpiah Costume. The costume was updated and a new version of the Lightning Account Upgrade has been released in September 2017, with 7 new Lightning themed items. The Fugunzel Treasure Map was also released in Account Upgrades in March 2008 with the original Lightning set and has not been available since. If you put this on your pet, they will have the yellow coloration and spark of Lightning! Lightning pets have their hair standing up and zig-zag patterns on certain pets.