Miscellaneous items

Item	Description	Effects	Location and Cost
Punch Card	Use to make punching attacks stronger in one battle. Use outside of battle to look at the card.	Increase ATK when in battle. Three can be traded in for a free Nice Cream.	Box next to Cart in Waterfall, 25G (15G if the protagonist was carrying an umbrella when Nice Cream was bought). Unavailable on the Genocide Route or after exhausting the Snowdin Forest kill counter on the Neutral Route.
Annoying Dog	A little white dog. It's fast asleep...	Absorbs the legendary artifact when used or dropped. Also gives the protagonist Dog Residue.	Legendary Artifact Room in Waterfall, Free. One of a kind.
Dog Residue	Varies (see page).	Fills the inventory with more Dog Residue, with a possibility of giving Dog Salad.	Legendary Artifact Room in Waterfall, Free.
Mystery Key	It is too bent to fit on your keychain.	Unlocks the front door of the house next to Napstablook's.	Bratty and Catty, 600G. Free on the Genocide Route. One of a kind
Silver Key	(not an inventory item)	Unlocks Sans's workshop.	Sans's room, Free. Only available on a no EXP earned Neutral Route after obtaining the key to Sans's room in the Last Corridor.
Undyne's Letter	Letter written for Dr. Alphys.	Used to regain access to Dr. Alphys's lab.	Undyne in Snowdin (or Waterfall if befriended after defeating Asgore) in the True Pacifist Route, Free. One of a kind.
Undyne's Letter EX	It has DON'T DROP IT written on it.	Used to regain access to Dr. Alphys's lab.	Undyne in Snowdin if the protagonist drops Undyne's Letter, Free. One of a kind.
0	If you are reading this, I messed up somehow.	Dropping this item or viewing it in battle crashes the game	Unobtainable without glitches.^[1]