Secret Bases in Emerald: All 75 Spots & Decorations

Every Hoenn Secret Base spot grouped by its seven entrance forms, plus all 120 decorations with prices and where each one comes from.

Published

Hoenn has 75 Secret Base spots, and the game distinguishes exactly seven entrance tiles: the left and right halves of a Secret Power tree, a shrub, and four rock walls. Only five of those seven look any different on screen — three of the four rock-wall tiles draw the identical indent — so the route, not the colour, is what identifies a spot. You hold one base at a time, and furnish it from the 120 decorations the games ship.

Game
Ruby Sapphire Emerald
You need
Secret Power (TM43) — from the woman in the Mauville City house
Where
75 spots on 13 routes, in 7 entrance tiles — 5 you can tell apart by eye
To furnish it
120 decorations across 8 shelves

How to make a Secret Base in Ruby, Sapphire and Emerald

Secret Power is a normal attacking move that does something extra out of battle: used in front of a marked tree, shrub or rock wall, it hollows out a room behind it. The room is yours immediately, and the entrance stays open on the overworld from then on. Talk to the PC inside to move your base to a different spot, or to abandon it — you hold one base at a time and moving it leaves the old spot empty again.

Secret Power itself is TM43, handed over free by a woman in a house in Mauville City once you have talked to her about Secret Bases. Every spot in this guide accepts it; there is no second requirement, no badge gate and no story flag.

Note — The room you get is not the room you chose: The game has twenty base layouts and 75 entrances, so several spots lead into the same room. The layout is decided by the entrance, not by you — if you want a particular shape of room, the spot is the choice that decides it.

Warning — Moving house costs your decorations’ places: Relocating a base puts every decoration back in your PC rather than carrying the arrangement across. You keep the items; you lose the layout.

Secret Base entrance types: every form in Hoenn

The same entrance shape repeats all over the region, so the useful way to read the list is by form rather than route. These seven are the forms the game itself distinguishes — each one is a separate pair of tiles in the code, one closed and one open. Every link below opens the route map with that exact entrance framed and selected; it does not open a base interior, because the room behind a spot belongs to whoever dug it.

Note — Red, Yellow and Blue rock walls are the same picture: The game keeps three separate rock-wall entrance tiles and names them Red, Yellow and Blue Cave — but all three are built from the same four 8×8 tiles at the same palette, so they draw an identical dusty-rose indent wherever they stand. Nothing on screen tells them apart, and the sand, grass or water around a spot is the only thing that changes between them. The one rock wall that really does look different is the Brown Cave tile, which comes from Mt. Chimney’s ash-fall tileset and is olive-grey. So do not try to identify a spot by its colour: use the route lists below, or tap the spot on the map.

The seven entrance tiles at a glance
FormSpotsRoutes
Tree — left trunk7Route 110, Route 111, Route 114, Route 115, Route 118, Route 119, Route 121
Tree — right trunk7Route 110, Route 111, Route 114, Route 115, Route 118, Route 119, Route 121
Shrub13Route 119, Route 120
Rock wall (Red Cave tile)15Route 111, Route 113, Route 115, Route 118, Route 121, Route 123, Route 125
Rock wall (Yellow Cave tile)11Route 111, Route 115, Route 127
Rock wall (Blue Cave tile)10Route 116, Route 119, Route 120
Ash-fall rock wall (Brown Cave tile)12Route 114, Route 115

Tree — left trunk

A thick-trunked tree standing alone beside the path. Secret Power works on the LEFT half of the trunk, and that half is its own base.

The Secret Power tree on Route 110
Tree — left trunk — the spot on Route 110. 7 spots in Hoenn, across 7 routes.
Tree — left trunk: all 7 spots, numbered 1–7
RouteOpen on the map
Route 110Show spot 1 of 7
Route 111Show spot 2 of 7
Route 114Show spot 3 of 7
Route 115Show spot 4 of 7
Route 118Show spot 5 of 7
Route 119Show spot 6 of 7
Route 121Show spot 7 of 7

Tree — right trunk

The same kind of tree, entered from the RIGHT half of the trunk. Every Secret Power tree in Hoenn holds two separate bases, one per half, and they never share a room.

The Secret Power tree on Route 121
Tree — right trunk — the spot on Route 121. 7 spots in Hoenn, across 7 routes.
Tree — right trunk: all 7 spots, numbered 1–7
RouteOpen on the map
Route 110Show spot 1 of 7
Route 111Show spot 2 of 7
Route 114Show spot 3 of 7
Route 115Show spot 4 of 7
Route 118Show spot 5 of 7
Route 119Show spot 6 of 7
Route 121Show spot 7 of 7

Shrub

A dense bush in the Fortree treetop country. It parts sideways instead of opening a hole, and it is the only form that is not a tree or a rock wall.

A Secret Power shrub on Route 119
Shrub — the spot on Route 119. 13 spots in Hoenn, across 2 routes.
Shrub: all 13 spots, numbered 1–13
RouteOpen on the map
Route 119Show spot 1 of 13
Route 119Show spot 2 of 13
Route 119Show spot 3 of 13
Route 119Show spot 4 of 13
Route 119Show spot 5 of 13
Route 119Show spot 6 of 13
Route 119Show spot 7 of 13
Route 119Show spot 8 of 13
Route 120Show spot 9 of 13
Route 120Show spot 10 of 13
Route 120Show spot 11 of 13
Route 120Show spot 12 of 13
Route 120Show spot 13 of 13

Rock wall (Red Cave tile)

A shallow indent in dusty-rose rock, and the commonest spot in Hoenn: the desert edge, the eastern sea routes and the cliffs north of Rustboro. The game files call this tile Red Cave, but it is drawn from exactly the same four tiles and the same palette as the Yellow and Blue ones — so on screen it is not red, and it is not distinguishable from them. The route is what tells the three apart.

A rock-wall Secret Base spot on the Route 118 shore
Rock wall (Red Cave tile) — the spot on Route 118. 15 spots in Hoenn, across 7 routes.
Rock wall (Red Cave tile): all 15 spots, numbered 1–15
RouteOpen on the map
Route 111Show spot 1 of 15
Route 113Show spot 2 of 15
Route 115Show spot 3 of 15
Route 118Show spot 4 of 15
Route 118Show spot 5 of 15
Route 118Show spot 6 of 15
Route 121Show spot 7 of 15
Route 121Show spot 8 of 15
Route 123Show spot 9 of 15
Route 123Show spot 10 of 15
Route 123Show spot 11 of 15
Route 125Show spot 12 of 15
Route 125Show spot 13 of 15
Route 125Show spot 14 of 15
Route 125Show spot 15 of 15

Rock wall (Yellow Cave tile)

The same dusty-rose indent under the game’s Yellow Cave name, on Route 111’s desert edge, above Rustboro and along the cliffs of Route 127. Nothing on screen separates it from a Red or Blue Cave tile — the surrounding sand does not tint the rock, and the tile itself is identical.

A rock-wall Secret Base spot beside the Route 111 desert
Rock wall (Yellow Cave tile) — the spot on Route 111. 11 spots in Hoenn, across 3 routes.
Rock wall (Yellow Cave tile): all 11 spots, numbered 1–11
RouteOpen on the map
Route 111Show spot 1 of 11
Route 111Show spot 2 of 11
Route 111Show spot 3 of 11
Route 111Show spot 4 of 11
Route 111Show spot 5 of 11
Route 115Show spot 6 of 11
Route 127Show spot 7 of 11
Route 127Show spot 8 of 11
Route 127Show spot 9 of 11
Route 127Show spot 10 of 11
Route 127Show spot 11 of 11

Rock wall (Blue Cave tile)

The same dusty-rose indent once more, named Blue Cave in the game files, on Route 116 east of Rustboro and on the two Fortree routes. It is not grey-blue and it is not drawn differently; only the route tells you which of the three tiles you are standing at.

A rock-wall Secret Base spot on Route 116
Rock wall (Blue Cave tile) — the spot on Route 116. 10 spots in Hoenn, across 3 routes.
Rock wall (Blue Cave tile): all 10 spots, numbered 1–10
RouteOpen on the map
Route 116Show spot 1 of 10
Route 116Show spot 2 of 10
Route 116Show spot 3 of 10
Route 116Show spot 4 of 10
Route 119Show spot 5 of 10
Route 119Show spot 6 of 10
Route 119Show spot 7 of 10
Route 120Show spot 8 of 10
Route 120Show spot 9 of 10
Route 120Show spot 10 of 10

Ash-fall rock wall (Brown Cave tile)

The one rock wall you really can pick out by eye: an olive-grey indent from the Fallarbor ash-fall tileset, so it appears only on the two routes that run under Mt. Chimney’s ash fall.

An ash-fall rock-wall Secret Base spot on Route 114
Ash-fall rock wall (Brown Cave tile) — the spot on Route 114. 12 spots in Hoenn, across 2 routes.
Ash-fall rock wall (Brown Cave tile): all 12 spots, numbered 1–12
RouteOpen on the map
Route 114Show spot 1 of 12
Route 114Show spot 2 of 12
Route 114Show spot 3 of 12
Route 114Show spot 4 of 12
Route 114Show spot 5 of 12
Route 115Show spot 6 of 12
Route 115Show spot 7 of 12
Route 115Show spot 8 of 12
Route 115Show spot 9 of 12
Route 115Show spot 10 of 12
Route 115Show spot 11 of 12
Route 115Show spot 12 of 12

All Secret Base decorations and where to get them

A base starts empty. There are 120 decorations in Ruby, Sapphire and Emerald, sorted into the eight shelves the in-game menu uses, and where a piece comes from ranges from a shop shelf in Fortree to fifteen Battle Frontier prizes that cost Battle Points. The tables below list every one with the price where a shop sells it and the place where it does not.

Tip — The four you cannot buy, win or be given: The Seedot, Regirock, Regice and Registeel dolls appear in no shop and in no script in the games themselves: they were distribution-event items, and in normal play the only way to see one is in another player’s base after mixing records.

Desks

A desk is the only thing most small decorations can stand on, so it is usually the first purchase.

Desks
DecorationSizePriceWhere to get itIn-game description
Small Desk1×1₽3,000Fortree City Decoration ShopA small desk built for one.
Pokémon Desk1×1₽3,000Fortree City Decoration ShopA small desk built in the shape of a Poké Ball.
Heavy Desk3×2₽6,000Fortree City Decoration ShopA large desk made of steel. Put some decorations on it.
Ragged Desk3×2₽6,000Fortree City Decoration ShopA large desk made of wood. Put some decorations on it.
Comfort Desk3×2₽6,000Fortree City Decoration ShopA large desk made of leaves. Put some decorations on it.
Pretty Desk3×3₽9,000Route 113 Glass Workshop (Shards)A huge desk made of glass. Holds lots of decorations.
Brick Desk3×3₽9,000Fortree City Decoration ShopA huge desk made of brick. Holds lots of decorations.
Camp Desk3×3₽9,000Fortree City Decoration ShopA huge desk made of logs. Put lots of decorations on it.
Hard Desk3×3₽9,000Fortree City Decoration ShopA huge desk made of rocks. Holds many decorations.

Chairs

Chairs
DecorationSizePriceWhere to get itIn-game description
Small Chair1×1₽2,000Fortree City Decoration ShopA small chair made for one.
Pokémon Chair1×1₽2,000Fortree City Decoration ShopA small chair built in the shape of a Poké Ball.
Heavy Chair1×1₽2,000Fortree City Decoration ShopA small chair made of steel.
Pretty Chair1×1₽2,000Route 113 Glass Workshop (Shards)A small chair made of glass.
Comfort Chair1×1₽2,000Fortree City Decoration ShopA small chair made of leaves.
Ragged Chair1×1₽2,000Fortree City Decoration ShopA small chair made of wood.
Brick Chair1×1₽2,000Fortree City Decoration ShopA small chair made of brick.
Camp Chair1×1₽2,000Fortree City Decoration ShopA small chair made of logs.
Hard Chair1×1₽2,000Fortree City Decoration ShopA small chair made of rock.

Mats

Mats are the largest decorations in the game and the ones that actually do something: the note mats play a tone when stepped on, and the jump, spin and slide mats move you.

Mats
DecorationSizePriceWhere to get itIn-game description
Glitter Mat1×1₽2,000Lilycove Department Store 5FAn odd mat that glitters if stepped on.
Jump Mat1×1₽2,000Lilycove Department Store 5FA trick mat that jumps when it is stepped on.
Spin Mat1×1₽2,000Lilycove Department Store 5FA trick mat that spins around when stepped on.
C Low Note Mat1×1₽500Slateport City market stallsA mat that plays a low C note when stepped on.
D Note Mat1×1₽500Slateport City market stallsA mat that plays a D note when stepped on.
E Note Mat1×1₽500Slateport City market stallsA mat that plays an E note when stepped on.
F Note Mat1×1₽500Slateport City market stallsA mat that plays an F note when stepped on.
G Note Mat1×1₽500Slateport City market stallsA mat that plays a G note when stepped on.
A Note Mat1×1₽500Slateport City market stallsA mat that plays an A note when stepped on.
B Note Mat1×1₽500Slateport City market stallsA mat that plays a B note when stepped on.
C High Note Mat1×1₽500Slateport City market stallsA mat that plays a high C note when stepped on.
Surf Mat3×3₽4,000Lilycove Department Store 5FA mat designed with a Surf image. Put items on top.
Thunder Mat3×3₽4,000Lilycove Department Store 5FA mat designed with a Thunder image. Put items on top.
Fire Blast Mat3×3₽4,000Lilycove Department Store 5FA mat designed with a Fire Blast image. Put items on top.
Powder Snow Mat3×3₽4,000Lilycove Department Store 5FA mat with a Powder Snow image design. Put items on top.
Attract Mat3×3₽4,000Lilycove Department Store 5FA mat designed with an Attract image. Put items on top.
Fissure Mat3×3₽4,000Lilycove Department Store 5FA mat designed with a Fissure image. Put items on top.
Spikes Mat3×3₽4,000Lilycove Department Store 5FA mat designed with a Spikes image. Put items on top.

Plants

Plants
DecorationSizePriceWhere to get itIn-game description
Red Plant1×2₽3,000Route 104 Pretty Petal flower shopA vivid red potted plant.
Tropical Plant1×2₽3,000Route 104 Pretty Petal flower shopA flowering tropical plant in a pot.
Pretty Flowers1×2₽3,000Route 104 Pretty Petal flower shopA pot of cute flowers.
Colorful Plant2×2₽5,000Route 104 Pretty Petal flower shopA large pot with many colorful flowers.
Big Plant2×2₽5,000Route 104 Pretty Petal flower shopA large, umbrella- shaped plant in a big pot.
Gorgeous Plant2×2₽5,000Route 104 Pretty Petal flower shopA large, impressive plant in a big pot.

Posters

Posters hang on the wall, so they need free wall space rather than floor.

Posters
DecorationSizePriceWhere to get itIn-game description
Ball Poster1×1₽1,000Lilycove Department Store 5FA small poster printed with Poké Balls.
Green Poster1×1₽1,000Lilycove Department Store 5FA small poster with a Treecko print.
Red Poster1×1₽1,000Lilycove Department Store 5FA small poster with a Torchic print.
Blue Poster1×1₽1,000Lilycove Department Store 5FA small poster with a Mudkip print.
Cute Poster1×1₽1,000Lilycove Department Store 5FA small poster with an Azurill print.
Pika Poster2×1₽1,500Lilycove Department Store 5FA large poster with a Pikachu and Pichu print.
Long Poster2×1₽1,500Lilycove Department Store 5FA large poster with a Seviper print.
Sea Poster2×1₽1,500Lilycove Department Store 5FA large poster with a Relicanth print.
Sky Poster2×1₽1,500Lilycove Department Store 5FA large poster with a Wingull print.
Kiss Poster2×1₽1,500Battle Frontier Exchange Service Corner (BP)A large poster with a Smoochum print.

Ornaments

Ornaments
DecorationSizePriceWhere to get itIn-game description
Red Brick1×2₽500Slateport City market stallsA red-colored brick. Decorations can be placed on top.
Yellow Brick1×2₽500Slateport City market stallsA yellow-colored brick. Put some decorations on top.
Blue Brick1×2₽500Slateport City market stallsA blue-colored brick. Put some decorations on top.
Red Balloon1×1₽500Slateport City market stallsA red balloon filled with water. Bursts if stepped on.
Blue Balloon1×1₽500Slateport City market stallsA blue balloon filled with water. Bursts if stepped on.
Yellow Balloon1×1₽500Slateport City market stallsA yellow balloon filled with water. Pops if stepped on.
Red Tent3×3₽10,000Route 110 Trick House (free)A large red tent. You can hide inside it.
Blue Tent3×3₽10,000Route 110 Trick House (free)A large blue tent. You can hide inside it.
Solid Board1×2₽3,000Lilycove Department Store rooftopPlace over a hole to cross to the other side.
Slide2×4₽8,000Lilycove Department Store rooftopUse to slide down from the platform.
Fence Length1×1₽500Lilycove Department Store rooftopA small fence that blocks passage.
Fence Width1×1₽500Lilycove Department Store rooftopA small fence that blocks passage.
Tire2×2₽800Lilycove Department Store rooftopAn old large tire. Decorations can be placed on top.
Stand4×2₽7,000Lilycove Department Store rooftopA large pedestal with steps.
Mud Ball1×1₽200Lilycove Department Store rooftopA large ball of mud. Crumbles if stepped on.
Breakable Door1×2₽3,000Lilycove Department Store rooftopA weird door that people can walk right through.
Sand Ornament1×2₽3,000Lilycove Department Store rooftopAn ornament made of sand. Crumbles if touched.
Silver Shield1×2Battle Frontier — Scott's house (free)Awarded for 50 straight wins at the Battle Tower.
Gold Shield1×2Battle Frontier — Scott's house (free)Awarded for 100 straight wins at the Battle Tower.
Glass Ornament1×2Lilycove Museum 2F (free)A glass replica of a famous sculpture at the Art Museum.
TV1×1₽3,000Lilycove Department Store rooftopA small, gray- colored toy TV.
Round TV1×1₽4,000Lilycove Department Store rooftopA toy TV modeled in the image of a Seedot.
Cute TV1×1₽4,000Lilycove Department Store rooftopA toy TV modeled in the image of a Skitty.

Cushions

Cushions
DecorationSizePriceWhere to get itIn-game description
Pika Cushion1×1₽2,000Lilycove Department Store 5FA Pikachu cushion. Place it on a mat or a desk.
Round Cushion1×1₽2,000Lilycove Department Store 5FA Marill cushion. Place it on a mat or a desk.
Kiss Cushion1×1₽2,000Battle Frontier Exchange Service Corner (BP)A Smoochum cushion. Place it on a mat or a desk.
Zigzag Cushion1×1₽2,000Lilycove Department Store 5FA Zigzagoon cushion. Place it on a mat or a desk.
Spin Cushion1×1₽2,000Lilycove Department Store 5FA Spinda cushion. Place it on a mat or a desk.
Diamond Cushion1×1₽2,000Lilycove Department Store 5FA Sableye cushion. Place it on a mat or a desk.
Ball Cushion1×1₽2,000Lilycove Department Store 5FA Ball cushion. Place it on a mat or a desk.
Grass Cushion1×1₽2,000Lilycove Department Store 5FA grass-mark cushion. Place it on a mat or a desk.
Fire Cushion1×1₽2,000Lilycove Department Store 5FA fire-mark cushion. Place it on a mat or a desk.
Water Cushion1×1₽2,000Lilycove Department Store 5FA water-mark cushion. Place it on a mat or a desk.

Dolls

Dolls are the biggest shelf and the hardest to complete: the Kanto and Johto starters are Battle Frontier prizes, the Hoenn starters are Game Corner prizes, and four are event-only.

Dolls
DecorationSizePriceWhere to get itIn-game description
Pichu Doll1×1₽3,000Lilycove Department Store 5FA Pichu doll. Place it on a mat or a desk.
Pikachu Doll1×1₽3,000Lilycove Department Store 5FA Pikachu doll. Place it on a mat or a desk.
Marill Doll1×1₽3,000Lilycove Department Store 5F; Slateport City market stallsA Marill doll. Place it on a mat or a desk.
Togepi Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Togepi doll. Place it on a mat or a desk.
Cyndaquil Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Cyndaquil doll. Place it on a mat or a desk.
Chikorita Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Chikorita doll. Place it on a mat or a desk.
Totodile Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Totodile doll. Place it on a mat or a desk.
Jigglypuff Doll1×1₽3,000Lilycove Department Store 5FA Jigglypuff doll. Place it on a mat or a desk.
Meowth Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Meowth doll. Place it on a mat or a desk.
Clefairy Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Clefairy doll. Place it on a mat or a desk.
Ditto Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Ditto doll. Place it on a mat or a desk.
Smoochum Doll1×1₽3,000Battle Frontier Exchange Service Corner (BP)A Smoochum doll. Place it on a mat or a desk.
Treecko Doll1×1₽3,000Mauville City Game Corner (Coins)A Treecko doll. Place it on a mat or a desk.
Torchic Doll1×1₽3,000Mauville City Game Corner (Coins)A Torchic doll. Place it on a mat or a desk.
Mudkip Doll1×1₽3,000Mauville City Game Corner (Coins)A Mudkip doll. Place it on a mat or a desk.
Duskull Doll1×1₽3,000Lilycove Department Store 5FA Duskull doll. Place it on a mat or a desk.
Wynaut Doll1×1₽3,000Lilycove Department Store 5FA Wynaut doll. Place it on a mat or a desk.
Baltoy Doll1×1₽3,000Lilycove Department Store 5FA Baltoy doll. Place it on a mat or a desk.
Kecleon Doll1×1₽3,000Lilycove Department Store 5FA Kecleon doll. Place it on a mat or a desk.
Azurill Doll1×1₽3,000Lilycove Department Store 5F; Slateport City market stallsAn Azurill doll. Place it on a mat or a desk.
Skitty Doll1×1₽3,000Lilycove Department Store 5F; Slateport City market stallsA Skitty doll. Place it on a mat or a desk.
Swablu Doll1×1₽3,000Lilycove Department Store 5FA Swablu doll. Place it on a mat or a desk.
Gulpin Doll1×1₽3,000Lilycove Department Store 5FA Gulpin doll. Place it on a mat or a desk.
Lotad Doll1×1₽3,000Route 114 — Lanette's house (free)A Lotad doll. Place it on a mat or a desk.
Seedot Doll1×1₽3,000Not obtainable in normal play (event distribution only)A Seedot doll. Place it on a mat or a desk.
Snorlax Doll1×2₽10,000Battle Frontier Exchange Service Corner (BP)A large doll. Place it on a mat or a desk.
Rhydon Doll1×2₽10,000Lilycove Department Store rooftopA large doll. Place it on a mat or a desk.
Lapras Doll1×2₽10,000Battle Frontier Exchange Service Corner (BP)A large doll. Place it on a mat or a desk.
Venusaur Doll1×2₽10,000Battle Frontier Exchange Service Corner (BP)A large doll. Place it on a mat or a desk.
Charizard Doll1×2₽10,000Battle Frontier Exchange Service Corner (BP)A large doll. Place it on a mat or a desk.
Blastoise Doll1×2₽10,000Battle Frontier Exchange Service Corner (BP)A large doll. Place it on a mat or a desk.
Wailmer Doll1×2₽10,000Lilycove Department Store rooftop; Sootopolis City — house by the shore (free)A large doll. Place it on a mat or a desk.
Regirock Doll1×2₽10,000Not obtainable in normal play (event distribution only)A large doll. Place it on a mat or a desk.
Regice Doll1×2₽10,000Not obtainable in normal play (event distribution only)A large doll. Place it on a mat or a desk.
Registeel Doll1×2₽10,000Not obtainable in normal play (event distribution only)A large doll. Place it on a mat or a desk.

Secret Base FAQ

How many Secret Base locations are there in Hoenn?
75, spread over 13 routes. They are not evenly spread: Route 115 has eleven and Route 113 has one.
How many Secret Base entrance forms are there?
Seven in the game’s code, but only five you can tell apart on screen. The left and right halves of a Secret Power tree are separate entrances, then a shrub, then four rock-wall tiles the files call Red, Yellow, Blue and Brown Cave — and the first three of those are drawn with exactly the same graphic.
What is the difference between the red, yellow and blue Secret Base rock walls?
Nothing you can see. All three use the same four tiles at the same palette, so they render identically; only the route they stand on differs. The fourth rock wall, Brown Cave, comes from the Mt. Chimney ash-fall tileset and is genuinely a different olive-grey graphic. Which of the three you used does not change what Secret Power does, either — the room you get is decided by the spot’s own base id.
Where do I get Secret Power in Ruby, Sapphire and Emerald?
TM43 is given free by a woman in a house in Mauville City after she has told you about Secret Bases.
Can I have more than one Secret Base?
No. You hold exactly one. Using the base PC to move house frees the old spot and clears the arrangement of your decorations, though you keep the decorations themselves.
How many Secret Base decorations are there?
120, on eight shelves: desks, chairs, plants, ornaments, mats, posters, dolls and cushions.
Which Secret Base decorations are the hardest to get?
The fifteen Battle Frontier dolls and posters, which cost Battle Points; the three Hoenn starter dolls from the Mauville Game Corner, which cost Coins; and the Seedot, Regirock, Regice and Registeel dolls, which were distribution-event items and appear in no shop or script at all.
Does the Secret Base spot decide what the room looks like?
Yes. Twenty room layouts are shared across the 75 entrances, and the entrance you use decides which one you get.