Endogeny is an amalgamate living in Snowdin. They appear in the battle with Asriel to steal his "Special Attack," They also appear at Grillby's playing cards with Lesser Dog. They are not shifted with anyone, but are in their location due the actions of another character.

Main Characters BoogiePapyrusCharaAsriel DreemurrTorielAsgore DreemurrUndyneSansFriskMettacrit
Ruins Enemies DummyFroggitWhimsumMoldsmalLooxVegetoidMigospAlphys
Snowdin Enemies SnowdrakeChilldrakeIce CapGyftrotDoggo
Dogamy and DogaressaLesser Dog Greater DogJerryGlyde
Waterfall Enemies AaronMoldbyggWoshuaTemmieMad DummyShyren
Hotland Enemies VulkinTsunderplanePyropeMuffetRoyal GuardsSo Sorry
CORE Enemies Final FroggitWhimsalotAstigmatismMadjickKnight Knight
Amalgamates MemoryheadEndogenyCorinthianLemon BreadSnowdrake's Mother
Hard Mode-only enemies ParsnikMoldessaMigospel
Vendors Nice Cream GuySnowdin ShopkeeperGersonTem ShopBratty and CattyBulgy Pecs
Other Characters NPCsMonster KidvoltrathelivelyRiver PersonFallen HumansNapstablook
W.D. GasterLost Souls