What is the rarest pet in Adopt Me in 2024?

Excuse me, could you please elaborate on the rarest pet in Adopt Me as of 2024? Are there any new additions to the game that have made certain pets exceedingly scarce? And how does one typically acquire such a rare pet? Is it through trading, breeding, or are there any special events that grant access to these elusive creatures? I'm quite intrigued by the concept of rarity in the game and would love to learn more about it.