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The Mechamalgamates are a group of monsters brought back from being "fallen down" by Undyne and PAPYRUS. Injected with determination amounts monsters couldn't handle, they collapsed into each other and became horrific creatures.To prevent the monsters from collapsing any further, Undyne would place them in robotic bodys, hence the "Mecha".

They appear in the True Lab arc as bosses.



A bird-like Mechamalgamate with a dangling tongue, torn butterfly wings, and bloodshot eyes. It is the alternate version of Reaper Bird.


A three headed dog-like Mechamalgamate with pipes all over, a rotating scorpion tail, and oozing Dog Residue. It is the alternate version of Endogeny.


A broken-down Snowdrake Mechamalgamate with vegetable monsters on their shoulders. It is the alternate version of Snowdrake's Mother.


An anglerfish mermaid Mechamalgamate with a second head for a neck. It is the alternate version of Lemon Bread.

Main Cast FloweyFriskCharaPAPYRUSAsgore DreemurrNapstablookSansAlphysMad Mew MewMettatonUndyneToriel
Ruins DummyRuins Bullies
Snowdin Dogamy and DogaressaDoggoLesser DogGreater DogSnowdin TrioSnowmanJerryMonster Kid
Waterfall Bassiere von Dohj IIIKnight KnightMadjickRG 01 and RG 02GersonMasaSpout WassarBratty and Catty
Hotland RG 03 and RG 04GlydeSo SorryParsnikAstigmatismMigospelMisyrmMuffetBurgerpants
The CORE Robot 98Robot 100The Season Dudes
True Lab MechamalgamatesMemoryheads
Other Characters Fallen humans (The Mage) • LilacW.D. GasterSpamton