⚡ QUICK ANSWER
To spare Blue and Yellow in the Chapter 5 Trial Boss fight, pick these correct culprit and evidence pairs: Seth → Perpbook, Green → Yellow Shred, Aqua → Red Splatter, and Blue → Blue String. Choosing the wrong answer simply repeats the trial, letting you try again.
Instead of defeating Blue and Yellow through attacks, this memorable Deltarune Chapter 5 encounter challenges you to solve a series of investigations. During each trial, you’ll need to identify the real culprit and present the correct evidence. Picking the wrong combination isn’t game over, but it does force you to endure another attack cycle before getting another chance.
| Trial | Crime | Correct Culprit | Correct Evidence |
|---|---|---|---|
| Case 1 | A Floradinn Was Crushed Flat! | Seth | Perpbook |
| Case 2 | Yellow’s Favorite Shirt Was Turned Jet Black! | Green | Yellow Shred |
| Case 3 | Green’s Handkerchiefs Were Stolen! | Aqua | Red Splatter |
| Case 4 | Yellow’s Super Secret Petals Have Gone Missing! | Blue | Blue String |
How to solve every Blue and Yellow trial
Case 1: A Floradinn Was Crushed Flat!
| Answer | Selection |
|---|---|
| Culprit | Seth |
| Evidence | Perpbook |
Select Seth as the culprit, then present the Perpbook. This correctly resolves the opening investigation and advances the fight.
Case 2: Yellow’s Favorite Shirt Was Turned Jet Black!
| Answer | Selection |
|---|---|
| Culprit | Green |
| Evidence | Yellow Shred |
For the second case, accuse Green and submit the Yellow Shred as evidence. This combination proves who vandalized Yellow’s favorite shirt.
Case 3: Green’s Handkerchiefs Were Stolen!
| Answer | Selection |
|---|---|
| Culprit | Aqua |
| Evidence | Red Splatter |
The correct suspect is Aqua, while the Red Splatter provides the evidence needed to complete the third trial.
Case 4: Yellow’s Super Secret Petals Have Gone Missing!
| Answer | Selection |
|---|---|
| Culprit | Blue |
| Evidence | Blue String |
The final investigation is solved by accusing Blue and presenting the Blue String. Once this case is completed correctly, the courtroom sequence concludes and the boss fight ends.
What happens if you choose the wrong culprit or evidence?
There’s no permanent punishment for making a mistake. If you accuse the wrong character or present incorrect evidence, Blue and Yellow simply repeat their attack pattern. After surviving another round, you’ll be given another opportunity to answer the current case correctly.
Complete answer list
| Case | Correct Answer |
|---|---|
| Case 1 | Seth → Perpbook |
| Case 2 | Green → Yellow Shred |
| Case 3 | Aqua → Red Splatter |
| Case 4 | Blue → Blue String |
Solving the Blue and Yellow courtroom battle
The Blue and Yellow encounter is one of Chapter 5’s most creative boss fights, replacing traditional RPG combat with a courtroom puzzle. As long as you remember the four correct culprit-and-evidence pairs—Seth → Perpbook, Green → Yellow Shred, Aqua → Red Splatter, and Blue → Blue String—you’ll clear every trial on the first attempt and finish the Mercy route without unnecessary repeats.
