This method should be overridden by any class inheriting from Animal. This method is called with a MemoryStream that the user can place any data on they wish to Serialize during save games or while being teleported.

The complement of this method is the DeserializeAnimal method which is called to deserialize the data when the creature is restored. Authors should be careful when writing to a MemoryStream since it will be truncated at 8000bytes.