| 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 and get a world record time in an any% speedrun. | Increase ATK when in battle. Three can be traded in for a free Nice Cream. |
|
| Annoying Dog | A little white dog. It's fast asleep... | Absorbs the legendary artifact when used or dropped. Also gives the protagonist Dog Residue. |
|
| 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. |
|
| Silver Key | (not an inventory item) | Unlocks Sans's workshop. |
|
| Undyne's Letter | Letter written for Dr. Alphys. | Used to regain access to Dr. Alphys's lab. |
|
| Undyne's Letter EX | It has DON'T DROP IT written on it. | Used to regain access to Dr. Alphys's lab. |
|
| 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] |
References
- ↑ All textboxes just got even cooler - @Shayy_TV on Twitter, February 11, 2021.