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Though Naoto Shirogane has been a part of Persona 4 Golden for a while by the time you enter the Secret Laboratory dungeon, it’s where you get to learn a lot about her – for instance, that Naoto is a (romanceable) woman, after being introduced to her as the “detective prince.”

RELATED: Persona 4 Golden: Naoto Shirogane Social Link Guide

But she’s got a lot of unresolved feelings that present in an unwillingness to mix with others, and it’s up to the Investigation Team to complete the dungeon and save Naoto from herself. For a little help getting through the Secret Lab dungeon in P4G, read on ahead with our guide.

We're focused on giving you information for the Secret Laboratory dungeon only, but our guide may still contain spoilers for the story of Persona 4 Golden.

Things To Know Before Going Into The Secret Laboratory

yu inspecting the locked door on b6f of the secret lab dungeon in p4g

The Secret Laboratory dungeon ahead is a little bit different from what you’re used to, in the sense that you’re descending through the dungeon instead of ascending. Keep this in mind when thinking about which floor you’re currently on.

You can first enter the Secret Lab dungeon beginning on 9/16. After this, you’ll have until 10/5 to finish the dungeon and rescue Naoto.

The dungeon has two locked doors on floors B4F and B6F, so be ready to be bouncing between floors looking for the keycards.

It may help to prepare for said lengthy crawl with plenty of healing items, just in case the constant running around wears down the team before the boss fight.

The shadows you’ll face on your descent into the Secret Laboratory dungeon in P4G will range from Lv. 44-55.

Because of this, we recommend entering Void Quest around Lv. 46-48 and grinding your way to roughly Lv. 55 before challenging the boss of the dungeon.

Every shadow you fight on the way yields a good amount of EXP, so be sure to engage the shadows as you go.

Shadows And Personas In The Secret Laboratory

yukiko knocking down a shadow with a critical hit and inflicting dizziness in the secret lab dungeon in p4g

While you're more than used to the battle mechanics of P4G by the time you're going through the Secret Lab dungeon to save Naoto, it still helps to be prepared.

We've got a full list of all the shadows you'll fight as you go through the Secret Lab, as well as the Shuffle Time Personas you're able to obtain from this dungeon below.

Persona Affinity Table Key

Label

Explanation

Str

This shadow is strong against this element, and attacks of this element deal less damage.

Wk

This shadow is weak against this element, and attacks of this element deal more damage.

Rep

This shadow will repel attacks of this element, reversing the damage onto you.

Nul

This shadow will nullify attacks of this element, and as such, they deal no damage.

Drn

This shadow will gain health from attacks of this element, so attacks of this heal the shadow.

-

Attacks of this element deal normal damage to the shadow.

Shadows In Void Quest

Shadow

Level

Available on Floors

Affinities and Weaknesses

Phys.

Fire

Ice

Elec.

Wind

Light

Dark

Almi.

Source Basalt

45

B1-B2

Wk

Rep

Str

Str

InsolentBasalt

45

B1-B2

Str

Str

Rep

Wk

Constancy Relic

46

B1-B2

Str

Wk

Flattering Hablerie

47

B1-B2

Wk

Rep

Inviting Nyogo

47

B1-B2

Wk

Rep

Royal Dancer

47

B1-B4

Str

Str

Str

Str

Str

Flowing Sand

47

B3-B4

Wk

Rep

Dismayed Panzer

48

B3-B4

Nul

Nul

Nul

Dogmatic Tower

48

B3-B4

Str

Wk

Furious Gigas

50

B3-B4

Rep

Rep

Red Sigil

48

B3-B4

Drn

Wk

Drn

Nul

Nul

Shallow Okina

49

B3-B4

Wk

Drn

Chaos Fuzz

51

B5

Wk

Rep

Rep

Rep

Rep

Rep

Fail Gene

52

B5

Rep

Mach Wheel

52

B5-B6

Str

Str

Wk

Mighty Beast

50

B1-B2 and B5

Wk

Str

Str

Wk

Rep

Power Castle

54

B3-B7

Rep

Rep

Wk

Wild Drive

51

B5-B6

Str

Wk

Nul

Nul

World Balance

52

B5-B6

Str

Str

Str

Str

Str

Wk

Wk

-

Mind Dice

53

B5-B7

Nul

Wk

Wk

Wicked Turret

53

B5-B8

Str

-

-

Wk

Nul

Wk

Nul

-

Immoral Snake

52

B6

Wk

Drn

Drn

Truth Pesce

53

B6

Drn

Drn

Drn

Fierce Cyclops

53

B6-B8

Wk

Drn

Drn

Drn

Drn

Order Giant

53

B7-B8

Str

Nul

-

Wk

Nul

Wk

Nul

-

Elegant Mother

54

B8

Wk

Nul

Str

Str

Rep

Rep

Jotun of Power

54

B8

Rep

Drn

Wk

Str

Hell Knight

55

B8

Str

Dominating Machine

55

B8

Nul

Nul

Wk

Shadows Only Present on Rainy Days

Shadow

Level

Appears on Floors

Affinities and Weaknesses

Phys.

Fire

Ice

Elec.

Wind

Light

Dark

Almi.

Rainy Brother 1

44

B1-B3, and B5-B6

Drn

-

Drn

Wk

Drn

Nul

Nul

-

Rainy Sister 1

44

B1-B3

Drn

Wk

Drn

Drn

Drn

Nul

Nul

-

Rainbow Twins

48

B3-B4, and B7-B8

-

-

-

Wk

Drn

Rep

-

Raindrop Musha

51

B5-B6

-

Wk

Drn

Drn

Drn

Nul

Nul

-

Rare Shadows

Opulent Hand

50

B2-B7

-

Str

Drn

Drn

Drn

Nul

Nul

-

shuffle time in the secret lab dungeon showing parvati in p4g

Shuffle Time Personas In The Secret Laboratory

Persona

Arcana

Level

Gorgon

Empress

34

Setanta

Emperor

34

Yamata no Orochi

Moon

34

Flauros

Hierophant

36

Samael

Death

36

Parvati

Priestess

37

Pazuzu

Devil

37

Dominion

Justice

38

Dis

Magician

39

Orthrus

Hanged Man

39

Genbu

Temperance

40

Yatagarasu

Sun

40

Oukuninushi

Emperor

41

Hitokoto-Nushi

Hermit

41

Alraune

Moon

41

Hanuman

Strength

42

Triglav

Chariot

43

Fuu-ki

Star

43

Gabriel

Empress

44

Succubus

Devil

44

Thoth

Emperor

45

Hokuto Seikun

Hierophant

45

Decarabia

Fool

46

Mot

Death

46

Rangda

Magician

47

Seiryuu

Temperance

47

Narasimha

Sun

47

Kikuri-Hime

Priestess

48

Kurama Tengu

Hermit

48

Girimehkala

Moon

48

Throne

Justice

49

Kali

Strength

50

Ganesha

Star

50

Pabilsag

Emperor

51

Skadi

Empress

52

Cerberus

Hierophant

52

RELATED: Persona 4 Golden: Every Dungeon, Ranked

Secret Laboratory Walkthrough

naoto confronting her shadow in the boss fight on b9f of the secret lab in persona 4 golden

How To Unlock The Door On B4F Of The Secret Laboratory

The majority of the Secret Laboratory dungeon in Persona 4 Golden is straightforward enough, outside the fact that you go downward instead of climbing. The goal is still the same: locating the stairs and slowly but surely making your way through the dungeon until reaching the boss fight on the final floor.

However, accessing the dungeon’s mini-boss fight located on B4F is much less simple.

the investigation team finding the dominating machine guard on b4f in the secret lab in persona 4 golden

On the fourth floor, you’ll find a locked door, for which you do not have the card needed to open it when you first arrive.

Because of this, you’ll need to carry on through the Secret Lab as normal for now, but remember where the door was, as you will return once you have it.

Continue until you reach B6F. Here, you’ll find another locked door. Once again, you do not have the key.

You find a key on this floor, though - but not the one for the locked door on this floor. Open the treasure chests around B6F until you locate the Research Card.

This is the card you needed for the door on B4F, so head back up to B4F once you have the Research Card.

When you use the card on the locked door there, Rise warns you of the presence on the other side. Confirm you're ready, and then begin the mini-boss fight against Dominating Machine.

rise warning the investigation team about dominating machine on b4f of the secret lab in persona 4 golden

Upon defeating the mini-boss, you’ll be rewarded with the Leader Card, which opens the door on B6F. Head back there and use the card on the door to press onward.

How To Reach The Basement Of The Secret Laboratory

After unlocking the door on B6F with the Leader Card, continue down until you reach B9F. This is where you’ll find Shadow Naoto.

This floor, B9F, is also where you can take on Extreme Vessel if you choose to re-challenge the Secret Lab after defeating it.

Heal up your party if need be, and then head through the door to trigger the boss fight against Shadow Naoto.

NEXT: Persona 4 Golden: The Best Party For Each Dungeon