Amalgamates



The Amalgamates are a group of monsters brought back from the dead by Alphys, by infusing them with Determination during an experiment to harness the power of Souls and create an artificial soul power to escape the Underground. Unfortunately, monster bodies don't have enough physical matter to handle the determination, and as a result, the magic that composed them lost cohesion and fused together into strange and often horrifying creatures.

Before they had fused together, the Amalgamates had a brief time where they were able to live normally, and during this period Alphys had promised their families she would return them. Once they fused, however, she became ashamed of her failure, and confined them inside the True Lab.

Many Amalgamates appear to have regressed to a partial bestial state, attacking Frisk in the belief they have food while exploring the lab (or the fact that they did have food, had they bought it from the vending machine). Despite this, Frisk can allow them to remember their old lives through battle, allowing them to be spared because they still retained their souls.

An unnamed Amalgamate can even tuck Frisk into bed, should they decide to lay down in it and remain still for long enough. The Amalgamate will then pat Frisk on the head and disappear. It is possible that this Amalgamate is the same one inside of the bathtub, due to their similar shape.

Fight-able Amalgamates include the Memoryhead, Endogeny, Reaper Bird, Lemon Bread, and Snowdrake's Mother.

None of the Amalgamates can be successfully attacked; all battles with them will end peacefully or in a Game Over. This may be due to Frisk's lack of harmful intent (as they are only accessible in the Pacifist Route) or because of the Amalgamates' unusual abilities and determination.

Neutral Route
They are implied to be discovered by the monsters in one neutral ending where Alphys survives to rule over the monsters.

Pacifist Route
In the end of the Pacifist Route, Alphys reunites the Amalgamates with their families.

Trivia

 * In Toby's Halloween Earthbound ROM Hack, there are foes called Amalgamates.