Mad Dummy is a ghost that lives inside a dummy located in the Garbage Dump. It is apparently the cousin of the dummy seen in the Ruins.
Regardless of how the protagonist interacted with the first dummy, Mad Dummy will be enraged by it. It attacks Frisk with the intention of stealing the their soul, allowing it to move to the surface and stand in the window of fancy stores. The fight is later accidentally stopped by Napstablook, whose magic tears cause the Dummy to flee due to not wanting to deal with the pain they cause. After the fight, it can be found outside of Undyne's house taking a job as a punching bag.
In the True Pacifist route epilogue, the dummy will remark about the barrier being destroyed and express its apology to the protagonist for "being a dummy."
When encountering Mad Dummy in the Genocide Route, the amount of hatred directed towards the player and their actions allows it to fully fuse with their body, fulfilling its lifelong wish of becoming completely corporeal. As a reward, it is willing to spare Frisk/Chara as soon as combat begins. Unfortunately for the newly-renamed Glad Dummy, its new vulnerability to physical attacks allows the child to effortlessly destroy it in a single blow.
If the protagonist decides to abandon the route for Glad Dummy, they can be found outside Undyne's House and will continue to thank the protagonist for their corporeal form, though this will end the genocide route.
Powers and Stats
Tier: Low 7-C | Likely 9-B
Name: Mad Dummy, Angry Dummy | Glad Dummy
Gender: Unknown, likely not applicable
Classification: Ghost possessing a Dummy
Powers and Abilities: Superhuman Physical Characteristics, Flight, Levitation, Soul Manipulation, Intangibility, Immortality (Type 7), Telekinesis, Danmaku, Resistance to Soul Manipulation (Can take hits at they soul like a normal attack)
Speed: At least Massively Hypersonic+, likely much higher
Lifting Strength: Unknown (Doesn't have arms)
Striking Strength: Unknown (Armless, but not harmless)
Durability: Unknown (Despite their physical body being fragile, they are able to reform it easily as their true form is intangible and immune to non-magical harm. Even this only hurts it and doesn't kill it) | Unknown (Destroyed in a single shot by Chara and possesses 0 defense)
Range: Several meters to possibly dozens of meters
Standard Equipment: Knife, Dummies, Dummy Bots
Intelligence: Average, though it is insane
Weaknesses: Insane, Magic attacks can cause him pain. Weak against murder intentions. | His physical form can now be hit. Weak against murder intentions.
- Dummies: Summons small dummies that shoot magic blasts.
- Dummy Bots: Summons small mechanical dummies that shoot magical homing missiles.
- Knife: Mad Dummy throws a knife. One use only.
Key: Mad Dummy | Glad Dummy