To spare all five fightable Amalgamates in Undertale’s True Lab, use the required ACT choices for each encounter: Memoryhead, Endogeny, Reaper Bird, Lemon Bread, and Snowdrake’s mother. The available encounter instructions establish the actions for four, but not Lemon Bread’s; that sequence is left unspecified rather than guessed.
Amalgamate spare actions at a glance
| Encounter | Actions to spare | Order matters? | Location or trigger | Shortcut item |
|---|---|---|---|---|
| Memoryhead | ACT → CELL, then choose Refuse | Yes: refuse after the CELL choice | Appears after turning on three sinks in the room before the red key slot | Not stated in The Undertale Wiki encounter reference |
| Endogeny | Beckon, Pet, Play, Pet, Pet | Yes | Not stated in The Undertale Wiki encounter reference | Stick or Hush Puppy can spare it immediately |
| Reaper Bird | Pick On, Pray, Mystify | No; use them in any order | Not stated in The Undertale Wiki encounter reference | Not stated in The Undertale Wiki encounter reference |
| Lemon Bread | Not established by the available encounter reference | Not stated | Not stated in The Undertale Wiki encounter reference | Not stated in The Undertale Wiki encounter reference |
| Snowdrake’s mother | Joke three times | Yes | Disguised as the last refrigerator in the True Lab refrigerator room | Not stated in The Undertale Wiki encounter reference |
The Undertale Wiki is a community-maintained reference, not an official developer guide. The cited reference pages are its Amalgamate overview and the encounter references for Memoryhead, Endogeny, Reaper Bird, and Snowdrake’s mother.
How to spare Memoryhead
- Choose ACT → CELL.
- When the group offers a choice, select Refuse.
Memoryhead appears after you turn on three sinks in the room immediately before the red key slot.
How to spare Endogeny
- Choose Beckon.
- Choose Pet.
- Choose Play.
- Choose Pet twice more.
Using a Stick or Hush Puppy can spare Endogeny immediately. That shortcut does not provide the yellow credits text; follow the full ACT sequence if you want that text.
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How to spare Reaper Bird
Use Pick On, Pray, and Mystify in any order. Clean and Hum do not replace those actions.
How to spare Lemon Bread
The available encounter reference does not establish Lemon Bread’s sparing actions or their order. Because an incorrect ACT sequence could mislead you during the fight, no sequence is supplied here.
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How to spare Snowdrake’s mother
Choose Joke three times. Snowdrake’s mother is disguised as the last refrigerator in the True Lab refrigerator room; Heckle is not the sparing action.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why these encounters use ACT choices
The Amalgamates are associated with Alphys’s Determination experiments in the True Lab. Their fights ask the player to recall parts of their former lives through ACT choices; in the True Pacifist ending, they reunite with their families.
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