Event animals are animals that could only be obtained through a limited time event and had to be bought with the special currency of the time before being present in the wild. These animals were not released permanently. Once they have been purchased they are found in an identical manner to regular animals. To tame the baby animal, the player has to search the stampede for a 'match' after the adult has been purchased. Once the event expires, the player can still obtain the content from that event in following events, most namely, the next anniversary event, which is a chance to catch up on any missed material.