User blog comment:AustinD-3/P1/@comment-7819820-20150608004936/@comment-7819820-20150608233925

Actually, the IDs listed at mascots.json are bots that appear randomly at servers. If you try to search those IDs at CP Buddy List itself nothing will load, but if you put at Cloud Penguin Addon Playercard Finder, they are actually accounts named like Cpbot23 or Cpyeti65 with the in-game name changed to look like mascots. That's one of the reasons the Buddy List don't notify users about mascots online anymore. Since CP is using bots with totally different information, the Buddy List won't warn you if they are online, since they are other account.