To attempt a Pacifist/Mercy clear against Flowery, avoid attacking, spend TP on Posey or PoseyZ to raise Mercy, survive with Orange Soul dashes through dark-blue walls, and spare only when the game makes the option available, but the exact final Mercy threshold is not verified yet.
Flowery is one of the trickier Chapter 5 topics right now because the available battle notes do not fully agree on how much of the encounter is documented. The safest play is to treat this as a cautious Mercy route plan: use the listed ACTs that raise Mercy, learn the Orange Soul Mode movement rule, and do not assume a fixed phase order or final spare sequence unless your game clearly shows it.
What is confirmed about Flowery right now

One listed battle-data line includes DF 7000 / 16 / 0, but the formatting is unclear, so it should not be treated as a firm stat spread. Until the encounter is better documented, do not plan around exact numbers that the game itself has not made clear to you.
Video help
Who Flowery is in Chapter 5

Flowery is a distinct Chapter 5 Darkner tied to Asgore and the flower shop Dark World. Chapter 5’s Dark World is connected to Kris’ dad’s flower shop, which is why Flowery’s role sits so close to Asgore’s side of the story.
The spelling matters: Flowery is not simply Flowey from Undertale. The similarity is intentional enough to confuse players, but the Chapter 5 character should be treated as its own Deltarune character with its own rules.
Flowery ACTs and Mercy gains
| ACT | TP cost | Mercy gain | Use on Pacifist route | Verification status |
|---|---|---|---|---|
| Check | Not confirmed | Not confirmed | Use only if you need battle text | Listed, mechanics not explained |
| Posey | 160 TP | 10% Mercy | Main Mercy option | Documented value |
| PoseyZ | 125 TP | 10% Mercy | Main Mercy option, cheaper than Posey | Documented value |
| Blow | Not confirmed | Not confirmed | Do not rely on it for Mercy | Listed, effect not verified |
| BlowZ | Not confirmed | Not confirmed | Do not rely on it for Mercy | Listed, effect not verified |
The important Pacifist detail is that Posey and PoseyZ are the documented Mercy-raising ACTs. Both reportedly add 10% Mercy, but they have different TP costs, so your route depends on surviving long enough to afford them repeatedly.
Blow and BlowZ may appear in the ACT list, but their effects are not currently pinned down well enough to build a Pacifist route around them. If your goal is Mercy, spend TP on Posey or PoseyZ instead.
Current Pacifist route for Flowery
STEP 1/8
Enter without attacking

Start the fight as a Mercy attempt from the first turn and avoid using regular attacks.
STEP 2/8
Build TP safely

Graze, defend, and survive patterns so you can afford Mercy ACTs instead of wasting turns.
STEP 3/8
Use Posey when you can afford it

Spend 160 TP on Posey to add 10% Mercy.
STEP 4/8
Use PoseyZ when available

Spend 125 TP on PoseyZ for another 10% Mercy, making it the cheaper confirmed Mercy option.
STEP 5/8
Dash through dark-blue walls

During Orange Soul Mode, dash through dark-blue walls instead of dodging them like normal barriers.
STEP 6/8
Heat or defend when pressured

If the party is at risk, stay alive first; a Mercy route fails if you rush ACTs and get wiped.
STEP 7/8
Repeat Mercy ACTs

Keep using Posey or PoseyZ until Mercy is high enough for the fight to move forward.
STEP 8/8
Spare only when allowed

Use spare when the game makes it available, since the exact final Mercy threshold and command sequence are not confirmed yet.
Prioritize PoseyZ when it is available because it gives the same reported 10% Mercy as Posey for a lower 125 TP cost.
Orange Soul Mode survival
The one survival rule you should drill into muscle memory is simple: in Orange Soul Mode, you can dash through dark-blue walls. Treating those walls like standard barriers will make the fight feel much harder than it needs to be.
This matters because a Pacifist route asks you to survive long enough to build TP. You are not trying to race Flowery’s HP down; you are buying turns for Posey and PoseyZ, so every clean dash directly supports the Mercy plan.
Mistakes that break the Mercy attempt
The most obvious mistake is attacking out of habit. If you want a Pacifist/Mercy clear, do not use regular attacks just because the battle menu looks familiar.
Another common problem is saving TP for the wrong actions. Since Blow and BlowZ do not have verified Mercy effects yet, your safest TP spending is on Posey and PoseyZ.
Do not treat dark-blue walls as ordinary walls, and do not import Undertale Flowey logic into this fight. Also be careful with secret-boss routes that discuss Chapter 5 generally but do not actually document Flowery’s Mercy ACTs.
Frequently Asked Questions
Is Flowery the same character as Undertale’s Flowey?
No. Flowery is spelled with -ry and is presented as a distinct Deltarune Chapter 5 Darkner. The name clearly invites comparison, but you should not assume Undertale boss rules apply.
Can you beat Flowery without attacking?
That is the intended Mercy approach based on the documented ACTs: avoid attacks, use Posey or PoseyZ to raise Mercy, survive the patterns, and spare when the option becomes available. The exact final threshold is still not confirmed.
What do Posey and PoseyZ do?
Posey costs 160 TP and reportedly adds 10% Mercy. PoseyZ costs 125 TP and also reportedly adds 10% Mercy, making it the cheaper confirmed Mercy ACT.
When can you spare Flowery?
Spare Flowery only when the game allows it. The exact Mercy threshold and final command sequence are not reliably documented yet, so do not assume a fixed number of ACT uses unless your current run clearly confirms it.
What does Orange Soul Mode change in this fight?
Orange Soul Mode lets you dash through dark-blue walls. That is the main survival mechanic to learn while you build TP for Posey and PoseyZ.