Items

ITEM button visible inside battle.

Items can be bought, picked up, and used throughout Undertale. The protagonist can carry up to 8 items at a time in their inventory, equip 2 items (a weapon and an armor), and store 10 items in each of the two Dimensional Boxes, allowing for a maximum of 30 items to be carried at a time. Items can be sold at the Tem Shop in Temmie Village.

Items usually have regular names which are visible in the inventory, as well as shortened names visible in battle, as a reference to old game translations. Names are often shortened in a comical way, but have a different short name displayed in Serious Mode. Since original Japanese games did not shorten item names, Undertale's Japanese translation does not shorten names in battle.

Consumables

Consumables are items which restore a certain amount of HP or give other boosts to the protagonist's stats like invulnerability or speed.

Name	Description	Effects	Source	Buy
Monster Candy	Has a distinct, non-licorice flavor.	Heals 10 HP	Ruins	N/A
Croquet Roll	Fried dough traditionally served with a mallet.	Heals 15 HP	Unused	N/A
Bandage	It has already been used several times.	Heals 10 HP when consumed	Start of the game	N/A
Rock Candy	Here is a recipe to make this at home: 1. Find a rock	Heals 1 HP	Unused	N/A
Pumpkin Rings	A small pumpkin cooked like onion rings. [Final] like onion rings but better [Old]	Heals 8 HP	Unused	N/A
Spider Donut	A donut made with Spider Cider in the batter.	Heals 12 HP	Spider Bake Sale	7G (Ruins) 9999G (Hotland)
Stoic Onion	Even eating it raw, the tears just won't come. [Final] Even if you eat it raw, the tears just won't come. [Old]	Heals 5 HP	Unused	N/A
Ghost Fruit	If eaten, it will never pass to the other side. [Final] You eat it, but it never passes through the other side [Old]	Heals 16 HP	Unused	N/A
Spider Cider	Made with whole spiders, not just the juice.	Heals 24 HP	Spider Bake Sale	18G (Ruins) 9999G (Hotland)
Butterscotch Pie	Butterscotch-cinnamon pie, one slice.	Heals All HP	Toriel's Home	N/A
Snowman Piece	Please take this to the ends of the earth.	Heals 45 HP	Snowdin	N/A
Nice Cream	Instead of a joke, the wrapper says something nice. [Final] The ultimate comfort food. [Unused]	Heals 15 HP	Nice Cream guy	15G (Snowdin) 25G (Waterfall) 15G (Waterfall, with umbrella) 12G (Hotland) 0G (3 Punch Cards)
Puppydough Icecream	Made by young pups.	Heals 28 HP	Unused	N/A
Bisicle	It's a two-pronged popsicle, so you can eat it twice. [Final] It's a popsicle that diverges in the center. [Unused]	Heals 11 HP	QC	15G (Initial, Snowdin) 30G (after Papyrus) 45G (after Undyne) 70G (after CORE) 0G (Genocide Route)
Unisicle	It's a SINGLE-pronged popsicle. Wait, that's just normal...	Heals 11 HP	Bisicle	N/A
Cinnamon Bunny	A Cinnamon roll in a shape of a bunny.	Heals 22 HP	QC	25G 0G (Genocide Route)
Temmie Flakes	It's just torn up pieces of colored construction paper.	Heals 2 HP	Tem Shop	1G (Sale) 3G (Normal) 20G (Expensiv) 1000G (Premiem, Genocide Route only)
Abandoned Quiche	A psychologically damaged spinach egg pie.	Heals 34 HP	Waterfall	N/A
Dog Salad	Recovers HP. (Hit Poodles.) [Final] A salad made by a DOG. Recovers a random amount of HP (Hit Poodles) [Unused]	Heal 2, 10, 30 or all HP	Dog Residue	N/A
Astronaut Food	For feeding a pet astronaut.	Heals 21 HP	Garbage dump	N/A
Instant Noodles	Comes with everything you need for a quick meal! [Final] The noodles are raw... fortunately, it comes with just enough materials to prepare them. [Unused]	Heals 4 HP (Normal) Heals 15 HP (Overworld) Heals 90 HP (Serious Mode)	Lab	N/A
Crab Apple	An aquatic fruit that resembles a crustacean. [Final] An apple grown by a crab. Tastes irritable. [Unused]	Heals 18 HP	Gerson	25G
Hot Dog...?	The "meat" is made of something called a "water sausage."	Heals 20 HP	Hotland	30G
Hot Cat	Like a hot dog, but with little cat ears on the end.	Heals 21 HP	Hotland	30G
Glamburger	A hamburger made of edible glitter and sequins.	Heals 27 HP	Burgerpants	120G
Sea Tea	Made from glowing marshwater.	Heals 10 HP +SPEED	Gerson	18G
Starfait	A sweet treat made of sparkling stars.	Heals 14 HP	Burgerpants	60G
Legendary Hero	Sandwich shaped like a sword. Increases ATTACK when eaten.	Heals 40 HP + 4 AT	Burgerpants	300G
Bad Memory	?????	Depletes 1 HP Heals all HP (if HP is 3 or less)	Memoryhead	N/A
Last Dream	The goal of "Determination."	Heals 17 HP	Asriel battle	N/A
Popato Chisps	Regular old popato chisps.	Heals 13 HP	True Lab	25G
Junk Food	Food that was probably once thrown away.	Heals 17 HP	Bratty and Catty	25G
Steak in the Shape of Mettaton's Face	Huge steak in the shape of Mettaton's face. (You don't feel like it's made of real meat...)	Heals 60 HP	Burgerpants	500G
Hush Puppy	This wonderful spell will stop a dog from casting magic.	Heals 65 HP	MTT Resort	N/A
Snail Pie	An acquired taste.	Heals to max HP -1	Ruins (Hard Mode)	N/A

Equippable items

Players can equip weapons and armor by selecting them from the protagonist's inventory. This allows them to increase certain stats in encounters. Players cannot de-equip the starting weapon and armor the protagonist has in the beginning of the game, they can only change them by equipping another kind of weapon or armor.

Some weapons and armor come in "sets", each appearing to be scattered belongings of one of the seven humans who fell down before the protagonist:

• Toy Knife and Faded Ribbon in the Ruins,
• Tough Glove and Manly Bandanna in Snowdin,
• Ballet Shoes and Old Tutu in Waterfall,
• Torn Notebook and Cloudy Glasses from Gerson,
• Burnt Pan and Stained Apron in Hotland,
• Empty Gun and Cowboy Hat from Bratty and Catty, and
• Worn Dagger and Heart Locket in Asgore's Home.

The battle with Omega Flowey displays items that are thematically similar to these sets during the SOULs' interference (knives, gloves, ballet shoes, notebooks, frying pans, gun).

Weapons

Weapons are equippable items which increase the protagonist's AT stat. They determine how the interface when selecting the FIGHT button in battle looks like, with different weapons having different amount of bars appearing when landing a hit and different attack animations. Some weapons have their attacks appear yellow and make a different noise if the player hits all of the sliding bars in the center when attacking. The protagonist's starting weapon is Stick.

Name	Description	Effects	Source	Buy
Stick	Its bark is worse than its bite.	N/A	Start of the game	N/A
Toy Knife	Made of plastic. A rarity nowadays.	+3 AT	Ruins	N/A
Tough Glove	A worn pink leather glove. For five-fingered folk.	+5 AT	QC Dimensional Box	50G 0G (Genocide Route)
Ballet Shoes	These used shoes make you feel incredibly dangerous.	+7 AT	Waterfall	N/A
Torn Notebook	Contains illegible scrawls. Increases INV by 6.	+2 AT +0.5 sec INV	Gerson	55G
Burnt Pan	Damage is rather consistent. Consumable items heal 4 more HP	+10 AT Heals 4 more HP every time a consumable is used	Hotland	N/A
Empty Gun	An antique revolver. It has no ammo. Must be used precisely, or damage will be low.	+12 AT	Bratty and Catty	350G 0G (Genocide Route)
Worn Dagger	Perfect for cutting plants and vines.	+15 AT	Asgore's Home	N/A
Real Knife	Here we are!	+99 AT	Asgore's Home	N/A

Armor

Armor are equippable items which increase the protagonist's DF stat. Certain armor items have other effects, such as healing every few turns, increased invulnerability, or even higher AT. The protagonist's starting armor is the Bandage, which becomes a consumable item once unequipped.

Name	Description	Effects	Source	Buy
Bandage	It has already been used several times.	Heals 10 HP when consumed	Start of the game	N/A
Faded Ribbon	If you're cuter, monsters won't hit you as hard. [Final] Monsters will be reluctant to hit you. [Demo]	+3 DF	Ruins	N/A
Manly Bandanna	It has seen some wear. It has abs drawn on it.	+7 DF	QC	50G 0G (Genocide Route)
Old Tutu	Finally, a protective piece of armor.	+10 DF	Waterfall	N/A
Cloudy Glasses	Glasses marred with wear. Increases INV by 9. (After you get hurt by an attack, you stay invulnerable for longer.)	+5 DF +1 sec INV	Gerson	30G
Stained Apron	Heals 1 HP every other turn.	+11 DF Heals 1 HP every other turn	Hotland	N/A
Cowboy Hat	This battle-worn hat makes you want to grow a beard. It also raises ATTACK by 5.	+12 DF +5 AT	Bratty and Catty	350G
Heart Locket	It says "Best Friends Forever."	+15 DF	Asgore's Home (Neutral and True Pacifist Route)	N/A
The Locket	You can feel it beating.	+99 DF	Asgore's Home (Genocide Route)	N/A
Temmie Armor	The things you can do with a college education!	+20 DF Heals 1 HP every other turn +0.5 seconds INV +10 AT	Tem Shop	9999G – 750G (Lowered after every death)

Miscellaneous

Miscellaneous items are items that cannot be consumed or equipped, but have a variety of other effects. They are often used for plot-related purposes.

Name	Description	Effects	Source	Buy
Punch Card	Use to make punching attacks stronger in one battle. Use outside of battle to look at the card.	+2-6AT (if Tough Glove is equipped, rate tapers off with higher AT)	Waterfall (buying a Nice Cream from the Nice Cream guy)	N/A
Annoying Dog	A little white dog. It's fast asleep...	Steals mysterious artifact if used or dropped Produces Dog Residue	Artifact room	N/A
Dog Residue	Shiny trail left behind by a dog. (ID 29) Dog-shaped husk shed from a dog's carapace. (ID 30) Dirty dishes left unwashed by a dog. (ID 31) Glowing crystals secreted by a dog. (ID 32) Jigsaw puzzle left unfinished by a dog. (ID 33) Web spun by a dog to ensnare prey. (ID 34)	Fills inventory with Dog Residue/Dog Salads	Annoying Dog	N/A
Undyne's Letter	Letter written for Dr. Alphys.	Advances plot when given to Alphys.	Undyne	N/A
Undyne's Letter	Letter written for Dr. Alphys.	Advances plot when given to Alphys.	Undyne	N/A
Undyne's Letter	It has DON'T DROP IT written on it.	Advances plot when given to Alphys. Cannot be dropped.	Undyne	N/A
Undyne's Letter	It has DON'T DROP IT written on it.	Advances plot when given to Alphys. Cannot be dropped.	Undyne	N/A
Mystery Key	It is too bent to fit on your keychain.	Unlocks the building next to Napstablook's house.	Bratty and Catty	600G
Silver Key		Unlocks Sans's workshop	Papyrus and Sans's house (Sans's room)	N/A

There is an additional item named "0" with the description of "If you are reading this, I messed up somehow." It is used to represent empty inventory slots, and is not meant to be normally visible without glitches. Dropping it or viewing it in battle crashes the game.