On the 31st of May in 2011 there were three updates. This was one of the few days Club Penguin updated on a Tuesday instead of Thursday. Herbert attacked the EPF, the sports catalogue was updated, and along with the updated catalogue the Soccer Stadium replaced the Ice Rink again.
In order to attack the Elite Penguin Force Herbert used the hydras from that year’s Medieval Party. This event is known as the Battle of Doom. If you defeated Herbert you would get the EPF Badge Pin and Hydra Head furniture items. Here is a video of the battle in action:
As for the sports catalogue, the new items were soccer themed to go along with the Ice Rink being replaced with the Soccer Stadium like every year. The catalogue had six pages of clothing items and one page of furniture items.
Want to see and learn more? Check out these pages about the topics mentioned above.