Most pets come out of themed lootboxes, offered during events and seasons.
How Lootboxes Work
Each lootbox is tied to an event or season (Minecraft, WoW, Dead Meme, Christmas, Halloween, Spring, and more). Opening one rolls a pet from that box's drop table at its given rarity odds.
Event History
The Categories pages list every lootbox and the pets obtainable from each, an at-a-glance history of every event seen on the server.