- For the paths you can take, see Seafloor Ruins/Eastern, Seafloor Ruins/Western, and Seafloor Ruins/Central.
Seafloor Ruins (SFR) is a dungeon that is located in Archford. To get here 
HM Dive is needed and the player must navigate the underwater portion of Archford to access it, but a shortcut to the dungeon from Greenport Town can be accessed upon completing the dungeon, via the whirlpool near the dock. The Pokémon located here are mostly all Water-types. Seafloor Ruins leads to three other variations. Each more difficult, and only accessible the hidden stairs found on Floor 20.
There are two possible bosses that the player can face that depend on whether or not the player takes the secret stairs on Floor 20.
Attributes
| Traps | |
|---|---|
| Icon | Name |
|
Grimy Trap |
|
Mud Trap |
|
Slumber Trap |
|
Spikes Trap |
|
Spin Trap |
|
Stealth Rock Trap |
|
Sticky Trap |
|
Toxic Spikes Trap |
|
Trip Trap |
|
Wonder Tile |
There are ruins that can be found on Floors 5, 10 and 18. The ruins on Floor 18 are notable in that they hold a 
Seafloor Key, which is needed to progress further into the dungeon should the player take the Eastern section of the later floors.
On Floor 20 there is are hidden stairs that always shows up. It is marked by a tan uncracked tile. To proceed further into the dungeon the player has to enter these stairs. Taking the normal staircase on this floor and Floor 21 leads to a boss and false ending, and does not lead further into the dungeon.
Eastern Seafloor Ruins
To get to Eastern Seafloor Ruins the player must defeat the boss located beyond the room, then on Floor 21, proceed to use the Seafloor Key on the sealed stairs pointing to the right.
Western Seafloor Ruins
To get to Western Seafloor Ruins the player must defeat the boss located beyond the room, then on Floor 21, two players must step on the switches unlocking the sealed stairs pointing to the left.
Central Seafloor Ruins
To get to Central Seafloor Ruins the player must solve the puzzle located in the room and then use a 
Sea Dew obtainable from end boxes in Western or Eastern Seafloor Ruins. To solve the puzzle the player must enter the warp located to the left of the exit at the top, then take the following path:
- Left
- Up
- Right
- Right
- Right
- Right
- Up
- Up
- Down
Once completed, the player must step on switches to keep open sealed doors before arriving at the sealed door that requires a Sea Dew to open.
Bosses
Whiscash
If the player takes the regular stairs on Floor 20, Whiscash encounters the player, and then battles the player to see how useful he is. After defeat, he leaves. It knows the moves Aqua Tail, Amnesia, Mud Bomb, and Zen Headbutt.
Boss drop:
2 Mushrooms
Dialogue:
- Whiscash: Whaaa?!
- Whiscash: Hurp! It looks like I got lost again... Oh boy, the boss is going to be so angry with me. Hurp!
- Whiscash: But I was just so hungry... I couldn't help chasing after those deliciou--
- Whiscash: Hurp. Oh boy, the boss will be so happy if I defeat you! Haha!
- Whiscash: I'll finally be able to prove I'm not useless!
- Whiscash: Hurp. Here I come!
- Whiscash: Whaaa?! I lost...? Well, no surprise there!
- Whiscash: Eeeeeek! I better run!
Team Razor Shell
If the player takes the Floor 20 secret stairs, they encounter Team Razor Shell. The player walks in on them as they are trying to search for the legendary Pokémon that resides in the dungeon. They detect the player, asking how long they were eavesdropping for. Floatzel claims that there is too much at stake and tells the player they brought this upon themselves and attack. Upon defeat, and before leaving, Floatzel tells the player that their Boss will not be happy and claim that they will get revenge.
They know the following moves:
- Seaking: Supersonic, Megahorn, Waterfall, Horn Attack
- Octillery: Lock-On, Hydro Pump, Gunk shot, Bullet Seed
- Lanturn: Thunder Wave, Signal beam, Electro Ball, Hydro Pump
- Whiscash: Amnesia, Mud Bomb, Aqua Tail, Zen Headbutt
- Floatzel: No moves
Dialogue:
- Floatzel: ...Hm.
- Octillery: Oh, man. Why'd we even come to these ruins... I'm getting tired looking at all these ancient things... It's not like we'll find any legendary Pokémon here.
- Floatzel: ...I think we're on the right track. The aura is getting much stronger here. I can feel it running through my fins.
- Floatzel: ...We must be getting close to finding the legendary Pokémon who is said to lurk in these ancient ruins...
- Seaking: Heh! Geez! I feel so hungry... Maybe we should stop for a bit and eat something?
- Whiscash: ...Yeah man. I know, I know!!! I'm surrounded by water yet I feel so thirsty!
- Lanturn: ...
- Lanturn: ...Shut it, you useless burdens! I knew we shouldn't have brought you with us, I don't know why the boss even sent you two, you're just dead weight.
- Octillery: Crikey, mate! Easy on the tone, aye? We know we are getting closer and I'm getting sleepy too. These depths are too haza-...
- Lanturn: -Wait... I hear something!
- Whiscash: Haha!!! It's probably just my tummy rumblin' tumblin'!
- Floatzel: ...
- Floatzel: ...No.
- Floatzel: ...This is something more serious. This frequency is disturbing the ecosystem around these parts. I feel we are being watched...
- Lanturn: ...Gaah!!
- Lanturn: ...W-who could that be?
- Floatzel: ...
- Floatzel: ...
- Floatzel: ...T-there you are!!!
- Lanturn: ...W-who are you?!
- Seaking: Oh geez! A stranger!
- Floatzel: ...
- Floatzel: ...Hey, you! How long have you been eavesdropping on us?
- Lanturn: ...I-if just boss found out about this...
- Lanturn: ...We would get into serious trouble!
- Floatzel: ...No. We can't risk anything, too much is at stake!
- Floatzel: ...Well. You brought this yourself, eavesdropper. We're going to wipe the seafloor with you!
- Lanturn: ...We are Team Razor Shell, here we come!
- Whiscash: Urrp! My stomach hurts more... I don't know if I can even feel hunger anymore...
- Octillery: Yaowch! Quite the stinger, aren't 'cha mate?
- Lanturn: Our health levels are sufficiently low, this is bad. How... How did they manage to do this to us...?!
- Seaking: I-I think we s-should ruuuun while we still can...!
- Floatzel: Gah, we have no choice... Boss will not be very... happy.
- Floatzel: Hey, you! Listen, we will get our revenge, sooner or later. This isn't over, not yet. We'll be back... Don't forget....
- Whiscash: Urrp! Wait for me!!
Floor 20/21 End Room
The first end room is accessed after the fake boss on Floor 20 or through the regular stairs on Floor 21.
Box items:
- Mystic Water
- Water Stone
- Huge Apple
- Revive
- Pearl
- TM Facade
- TM Rain Dance
Floor 41 End Room
The second end room is accessed through the regular stairs on Floor 41.
Box items:
- Soothe Bell
- Huge Apple
- TM Psychic
- TM Scald
- Big Pearl
- TM Ice Beam
- King's Rock
Pokémon
Pokémon in bold are recruitable. Please visit the Recruitable Pokémon page for more information.
| Portrait | # | Pokémon | Floor | Recruit rate |
|---|---|---|---|---|
 | 061 | Poliwhirl | B1-20F, B41F | Unrecruitable |
 | 072 | Tentacool | B1-20F, B41F | Unrecruitable |
 | 080 | Slowbro | B1-20F, B41F | Unrecruitable |
 | 087 | Dewgong | B1-20F, B41F | Unrecruitable |
 | 130 | Gyarados | B1-20F, B41F | Unrecruitable |
 | 134 | Vaporeon | B1-20F, B41F | Unrecruitable |
 | 159 | Croconaw | B1-20F, B41F | Unrecruitable |
 | 183 | Marill | B1-20F, B41F | Unrecruitable |
 | 194 | Wooper | B1-20F, B41F | Unrecruitable |
 | 222 | Corsola | B1-20F, B41F | Unrecruitable |
 | 298 | Azurill | B1-20F, B41F | -1% |
 | 318 | Carvanha | B1-20F, B41F | Unrecruitable |
 | 351 | Castform | B1-20F, B41F | Unrecruitable |
 | 364 | Sealeo | B1-20F, B41F | Unrecruitable |
 | 394 | Prinplup | B1-20F, B41F | Unrecruitable |
 | 419 | Floatzel | B1-20F, B41F | Unrecruitable |
 | 073 | Tentacruel | B11-20F, B41F | Unrecruitable |
 | 160 | Feraligatr | B11-20F, B41F | Unrecruitable |
 | 184 | Azumarill | B11-20F, B41F | Unrecruitable |
 | 195 | Quagsire | B11-20F, B41F | Unrecruitable |
 | 395 | Empoleon | B11-20F, B41F | Unrecruitable |
Items
| IS | Item | Location | Tile | Hidden |
|---|---|---|---|---|
|
Poké | B1-41F | Floor | No |
|
Scope Lens | B1-41F | Floor | No |
|
Shed Shell | B1-41F | Floor | No |
|
Water Diamond | B1-41F | Wall | No |
|
Water Stone | B1-41F | Floor | No |
|
|
Seafloor Key | B18F | Floor | No |
|
Green Apple | B1-41F | Floor | No |
|
Ether | B1-41F | Floor | No |
|
Max Ether | B1-41F | Floor | Yes |
|
Mental Herb | B1-41F | Floor | Yes |
|
Power Herb | B1-41F | Floor | Yes |
|
White Herb | B1-41F | Floor | Yes |
|
Sitrus Berry | B1-41F | Floor | No |
|
Cheri Berry | B1-41F | Floor | No |
|
Pecha Berry | B1-41F | Floor | No |
|
Persim Berry | B1-41F | Floor | No |
|
Passho Berry | B1-41F | Floor | No |
|
Yache Berry | B1-41F | Floor | No |
|
Sleep Seed | B1-41F | Floor | No |
|
Plain Seed | B1-41F | Floor | No |
|
Reviver Seed | B1-41F | Floor | Yes |
|
Gummis | B10-41F | Floor | No |
|
Smoke Ball | B1-41F | Floor | No |
|
Iron Thorn | B1-41F | Floor, Wall | No |
|
Silver Spike | B1-41F | Floor, Wall | No |
|
Pearl | B1-41F | Wall | No |
|
Big Pearl | B1-41F | Wall | Yes |
|
TM Facade | B1-41F | Floor | No |
|
TM Rain Dance | B1-41F | Floor | No |
|
All-Aim Orb | B1-41F | Floor | No |
|
Blowback Orb | B1-41F | Floor | No |
|
Cleanse Orb | B1-41F | Floor | No |
|
Evasion Orb | B1-41F | Floor | No |
|
Foe-Hold Orb | B1-41F | Floor | No |
|
Petrify Orb | B1-41F | Floor | No |
|
Pierce Orb | B1-41F | Floor | No |
|
Quick Orb | B1-41F | Floor | No |
|
Rainy Orb | B1-41F | Floor | No |
|
See-Trap Orb | B1-41F | Floor | No |
|
Slumber Orb | B1-41F | Floor | No |
|
Spurn Orb | B1-41F | Floor | No |
|
Totter Orb | B1-41F | Floor | No |
|
Big Mushroom | B1-41F | Floor | Yes |
|
Heart Scale | B1-41F | Floor, Wall | Yes |
|
Shards | B21-41F | Floor | Yes |
Mystery Eggs
Seafloor Ruins has Mystery Eggs that can appear on all floors.
| Portrait | # | Pokémon | Location | Tile | Hidden |
|---|---|---|---|---|---|
|
079 | Slowpoke | B1-41F | Floor | No |
|
086 | Seel | B1-41F | Floor | No |
|
118 | Goldeen | B1-41F | Floor | No |
|
129 | Magikarp | B1-41F | Floor | No |
|
|
222 | Corsola | B1-41F | Floor | No |
|
|
298 | Azurill | B1-41F | Floor | No |
|
|
318 | Carvanha | B1-41F | Floor | No |
|
456 | Finneon | B1-41F | Floor | No |
|
120 | Staryu | B21-41F | Floor | No |
Dungeon Objective
The main objective of this dungeon is to access the other Seafloor Ruins paths.
Rules
- On Floor 18 the player can pick up the Seafloor Key in the ruins located on the floor if they want to enter Eastern Seafloor Ruins.
- On Floor 20 the player must find the hidden stairs marked by an uncracked tan tile.
- If the player doesn't enter the Floor 20 hidden stairs, the regular stairs lead to a fake boss and ending room.
Once the player is inside of the hidden room, they have the option to go to Central Seafloor Ruins provided they have a Sea Dew, or continue to the midboss of Seafloor Ruins and on Floor 21, choose between using the Seafloor key to go to Eastern Seafloor Ruins or use the switches to go to Western Seafloor Ruins with at least one other player on.
Tips
- A Pass Scarf can help avoid damage for Razor Shell's boss fight.
- Beating the fake boss and exiting will reset any spawn point you have saved. To avoid this, use an Escape Orb instead.
- Pokémon with an Ability that absorbs water may help. Drought can work too.
Trivia
- Seafloor Ruins was created by Foxie.
- Unlike its continuations, Seafloor Ruins has no traditional Secret Rooms.
- Seafloor Ruins was the first non-event dungeon to have different routes.
- Inferno Volcano acts as a much less complex counterpart to Seafloor Ruins.
- Both dungeons have different main types. (SFR using Water while IV uses Fire.)
- Inferno Volcano also features a less intricate plot.
- Both dungeons have 60 floors.
- Both dungeons have their respective weather Legendary as the final boss (SFR with Kyogre and IV with Groudon).
- Inferno Volcano requires the player to climb up to its entrance while the player descends below the surface to enter Seafloor Ruins.