Ghastly Rat

World Event: Hallow's End

For this pet, you’ll need to head out to your garrisons in Lunarfall (Alliance) or Frostwall (Horde). You’ll also need to have a level 3 garrison. Once there, you’ll find a goblin vendor named Izzy Hollyfizzle who sells a wide variety of items.

However, to capture this pet you’ll need to purchase the item Creepy Crawlers for 5 Spooky Supplies. Spooky Supplies are obtained by completing daily quests offered by the orc Orukan, who can be found next to Izzy Hollyfizzle.

Once you get your five Spooky Supplies, purchase the Creepy Crawlers from Izzy and use the item. It will be consumed on use, and after that you should see pets have now spawned in your garrison for catching!

Another way to do this is to find someone who already has the decorations in their garrison, and see if they’ll let you pop in for a visit and some pet battling!