0 and 5
Batteries
Cleaning Products
Computers
Contact Lenses
DVDs
Flowers
Frozen Foods
Male Clothing
Musical Instruments
Pots of Paint
Sunglasses
Tools
Vegetables

1 and 6
Appliances
Balloons
Chocolate
Costumes
Eggs
Female Shoes
Minipet Food
Minipets
Pearls
School Supplies
Seeds
Sushi
Weapons

2 and 7
Armour
Bakery
Candy
Charity
Coffee Shop
Giant Vegetables
Gourmet Meat
Halloween Treats
Illegal Concoctions
Male Shoes
Pizza
Soft Drinks
Wallpaper
Wigs

3 and 8
Books
Canned Food
Car Parts
Fast Food
Fruits
Furniture
Giant Flowers
Hair Dye
Ice Cream
Potions
Stars
Voodoo Dolls

4 and 9
CDs
Charms
Cooking Ingredients
Female Clothing
Flooring
Giant Fruits
Lipsticks
Magic
Medicine
Stamps
Toys
Trading Cards

blitzen - finish level 30 of blitzen mission
christmas tree - random when trying to get a cracker from the christmas tree
elf - click to use an elf costume (don't actually use it) when you have an elf pet
frozen - have a frozen food item in your inventory
ice - complete level 27 of blitzen
ice cold - buy an item from the frozen foods shop
ice fairy - use an ice fairy costume on your pet
ice gnome - win over 50 battles against ice gnome
merry christmas - break a frozen advent wreath that someone has sent you
santa claws - do 140 santa claws quests
seasonal - use a seasonal costume on your chibs
seasons greetings - random when donating an advent calendar item (it must be from the advent section of wishlists) to the pot of gold
snowman - complete 50 snowman quests
snowman twin - win over 200 battles against snowman twin
snowy - search for snow costume and click to view it
xmas 07 - feed a christmas candycane to your pet

Broken Avatars:
dasher - attach a dasher to a snowy pet
tinsel - view a tinsel which is over 28 days old and is attached to a christmas pet

Retired Avatars:
advent
christmas
christmas eve
naughty