What's your favourite popular pet/item?

Since there's a sea of posts always asking what's your favorite unpopular pet, decided to post this for a change of pace!

Mine would definitely be the arctic reindeer! I vividly remember owning one back when it came out and I grew attached to it—forgot where little me traded it off to though since when I returned to Adopt Me, I no longer had it + for some reason the journal said I never had it? But it did also say I never had an Aussie egg either when I remember trading like 20+ eggs and keeping more so, probably some sort of glitch!