Party items were implemented for Tibia's 10th anniversary and most of them could be found in surprise bags looted from many different creatures. Since then, several NPCs that sell some of those items are introduced from time to time.

Party Items

Name		Attributes	Weight	Dropped By
Anniversary Backpack		Vol: 15	15.00	None.
Anniversary Cake		edible	5.00	None.
Bar of Chocolate		edible	0.10	Nightmare Scion, Undead Jester.
Cake		edible	5.00	None.
Candy		stackable, edible	0.05	The Mutated Pumpkin
Candy Cane		stackable, edible	0.50	Grynch Clan Goblin
Cookie		stackable, edible	0.10	Cave Rat, Grynch Clan Goblin, Mad Scientist, Witch, Munster.
Costume Bag (Common)		Temporarily gives you another costume	8.00	None.
Costume Bag (Deluxe)		Temporarily gives you another costume.	8.00	None.
Costume Bag (Uncommon)		Temporarily gives you another costume.	8.00	None.
Cream Cake		edible	5.00	Grynch Clan Goblin, Mad Scientist.
Decorated Cake		edible	6.00	None.
Fireworks Rocket		Explodes when used.	1.00	None.
Green Balloons		Can be hung on walls.	0.10	None.
Lump of Cake Dough		stackable	1.00	Grynch Clan Goblin
Party Cake		None	7.00	None.
Party Hat		Arm: 1	7.50	None.
Party Lampions (Green)		Can be hung on walls.	10.00	None.
Party Lampions (Red)		Can be hung on walls.	10.00	None.
Party Trumpet		Plays green musical notes when used.	0.50	None.
Party Wall Snake		Can be hung on walls.	10.00	None.
Party Wall Tinsel		Can be hung on walls.	10.00	None.
Piggy Bank		Gives platinum or gold coin when used.	7.50	Askarak Demon, Black Knight, Enlightened of the Cult, Grynch Clan Goblin, Hero, Infernalist, Lost Basher, Lost Berserker, Pirate Corsair, Priestess, Shaburak Demon, Undead Jester, Warlock.
Present (Explosive)		Explodes when used.	6.00	Undead Jester.
Red Balloons		Can be hung on walls.	0.10	None.
Shapechanger			2.00	None.
Spellwand		Turns you or someone else into a monster and sometimes spawns a Mad Sheep.	2.00	Undead Jester
Surprise Bag (Blue)		None.	10.00	None.
Surprise Bag (Red)		None.	10.00	None.
Surprise Nest		Stackable, useable.	20.00	None.
Suspicious Surprise Bag			8.00	Undead Jester.
Valentine's Cake		edible	5.00	Grynch Clan Goblin.
Yellow Pillow (Supersoft)		None.	16.00	Undead Jester

Items in Tibia Body Equipment Helmets Armors Shields Legs Spellbooks Boots Weapons Axe Weapons Distance Weapons Club Weapons Sword Weapons Wands Rods Ammunition Old Wands and Rods Tools and other Equipment Amulets and Necklaces Rings Keys Light Sources Tools Taming Items Household Items Books Containers Contest Prizes Decorations Documents and Papers Dolls and Bears Furniture Kitchen Tools Musical Instruments Trophies Plants, Animal Products, Food and Drink Creature Products Food Liquids Plants and Herbs Other Items Clothing Accessories Enchanted Items Game Tokens Magical Items Metals Party Items Quest Items Rubbish Runes Valuables