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The Amalgamates are five characters that come from Undertale. They appear as minor antagonists in the True Pacifist Run.


The Amalgamates trace their origin to botched attempts by Doctor Alphys to stop monsters from dying. She injected them with determination. At first, Alphys deemed her experiment failures, but to her surprise, the monsters opened their eyes. She is later dismayed when they started to merge together, causing her to live an austere life where she hid in the laboratory.



They make their first appearance when Frisk, the protagonist, exits the exit at the South Wing, turns left, heads to the West Wing, and then tampers with the sinks when they find them at the end. As they do so, three angry Memoryheads pop from the third sink, and Frisk is forced to fight them. Frisk eventually persists with their determination, gaining the red key in the process.

Memoryheads slightly resemble Giygas from the game series Earthbound, as well as Gibbering Mouthers and Feyrs from Dungeons and Dragons, as their face is basically a facial feature hodge-podge. Their main attack is summoning white bullets that are called Freak Bullets. These Freak Bullets are harmless on their own, but after a while, their bodies turn white and they explode, forming a wriggling face that must be avoided. If they get caught, Frisk will take some damage. Frisk must use their cell phone to call the Memoryheads and refuse to join their gang. Upon their defeat, Memoryheads seemingly disintegrate.

They make their next appearance when Frisk makes their way to the main power generator, attempting to swarm the young kid as their noses picked up Popato Chisps on them. Alphys stops them with offerings of food in the fridge, and explains their origin story. Memoryheads have no check data of their own. Unlike the other Amalgamates, the Memoryheads don't look like any known standard monster from the game.


This monster is located in the lab's East Wing's vent hall, being a boss. When Frisk arrives, they cannot see. They activate a switch on the wall. Suddenly, the Endogeny appears and ambushes them. Frisk's escape route is cut off, making the battle inevitable.

The Endogeny resembles a tardigrade somewhat, but retains canine features. It has a single orifice in the middle of its "face". Its overworld sprite looks similar, except that its sixth leg is missing. Its attacks use a variation of the Annoying Dog, but with its mouth. It may rocket around the battlefield or fire arrows from its maw. Both are damaging. Its spare conditions are in the following order: Beckon and pet the Endogeny, then play with it, then pet it twice more. The Check text for the Endogeny jokingly states that it is not clear how many dogs the creature counts as. It is related to Snowdin's dogs, reuniting with them in the epilogue.

Reaper Bird

This Amalgamate appears when Frisk makes their way past some mirrors in the East Wing. As they do so, an exclamation mark appears over their head, much to their confusion. They investigate, but the irate Reaper Bird pops out.

The Reaper Bird is composed of parts from the Astigmatism, Whimsalot (or possibly Whimsun), and the Final Froggit. It is rather tall, perhaps the tallest Amalgamate, so its body from the neck down has to compress on its turn. Its head is composed of the body of the Astigmatism, whose legs have been repurposed into the creature's beak. The Reaper Bird's arms/wings come from the Final Froggit's legs, while its own legs come from Whimsalot's/Whimsun's legs.

The Reaper Bird does not attack, but its minion, the Everyman, does so in its stead. Its appearance is that of an anthropomorphic, cartoon bird embryo with hollow, circular holes for eyes. On its first turn, the Everyman's face is devoured by butterflies as it writhes in agony. Its second turn has it rush the protagonist with butterflies on its head, now flaking off in droves. For its other attack, the Everyman lobs rotating copies of its head. These fake heads home in on the Frisk's SOUL.

The Reaper Bird can be spared by picking on it, praying, and then mystifying it in any order. If the Reaper Bird is then checked, the message "This relentless future finally looks brighter and brighter." plays.

Lemon Bread

This Amalgamate is encountered when Frisk makes their way past the Determination Extractor. As they get close to a suspicious-looking save-point, the Lemon Bread bursts from the save point and reveals her true form. However, she does allow saving before the battle starts. When the Lemon Bread is defeated, Frisk can make their way into the North Wing.

The Lemon Bread is composed of parts from Shyren's agent, an Aaron, and a Moldbygg. In battle, she attacks by biting down to damage Frisk's spirit. This attack works similarly to the microgame Cavity Calamity from WarioWare: Mega Microgames!. She can also trap their SOUL to damage it with energy beams fired from her eyes. Upon the initial encounter, she says "Welcome to my special hell." In the game's epilogue, she reunites with her sister Shyren.

Snowdrake's Mother

This Amalgamate has been trapped in Fridge Form. When Frisk makes their way into the North Wing's freezer and inspects the fridges, the Amalgamate pops out, resembling a yeti. Her actual form is like her son's, but she is female and is merged with two Vegetoids. She attacks with his blades, but these blades seldom target the SOUL. She can be spared when Frisk tells three bad jokes about snow. When you use the Check act, the message states that Snowdrake's Mother seems to be "losing (her)self." She is later reunited with her son.


  • Endogeny's battle song, known as "Woofenstein", is Dogsong slowed down.
  • Snowdrake's Mother's battle song, known as "So Cold", is a glitched and slowed-down version of Snowy.


           Undertale Logo.jpg/Deltarune Logo.png Villains

Flowey | Asgore Dreemurr | Muffet | Amalgamates | Susie

Mettaton | Mad Dummy

Frisk | Chara

King | Lancer | Rouxls Kaard | K. Round | Jevil | The Knight

The Anomaly

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