Goldenrod Underground Gold & Silver · Johto landmark

Map of Goldenrod Underground in Pokémon Gold and Silver — Underground passage (in-game map)

The Goldenrod Underground is a passage running beneath Goldenrod City, lined with shops, a hairdresser and trainers. Behind a locked door lies an unfinished basement full of Rocket Grunts and a shutter puzzle, which you open with the Basement Key during the Radio Tower takeover. It leads to the warehouse where the real Radio Tower Director is held, and your rival ambushes you on the way.

Wild Pokémon: None
Items: 15
Trainers: 16

Connects to: Goldenrod City

Where Goldenrod Underground is on the Johto map Goldenrod Underground on the Johto map

Wild Pokémon

No wild Pokémon here.

Trainers

Rival In the Underground, on the way to the warehouse

if you chose Cyndaquil (he has Totodile)

Prize ₽480

Rival In the Underground, on the way to the warehouse

if you chose Totodile (he has Chikorita)

Prize ₽480

Rival In the Underground, on the way to the warehouse

if you chose Chikorita (he has Cyndaquil)

Prize ₽480

Trainer	Pokémon	Prize	Where
Super NerdEric	Grimer 11 Grimer 11	₽88	Underground passage
Super NerdTeru	Magnemite 7 Voltorb 11 Magnemite 7 Magnemite 9	₽72	Underground passage
PokéManiacIssac	Lickitung 12	₽180	Underground passage
PokéManiacDonald	Slowpoke 10 Slowpoke 10	₽150	Underground passage
BurglarDuncan	Koffing 23 Magmar 25 Koffing 23	₽506	Switch room
BurglarEddie	Growlithe 26 Koffing 24	₽528	Switch room
Rocket GruntGrunt	Rattata 27	₽270	Switch room
Rocket GruntGrunt	Muk 23 Koffing 23 Rattata 25 Phone rematches (4) Rematch 1 · ₽330Houndour 33 Rematch 2 · ₽270Rattata 27 Rematch 3 · ₽240Raticate 24 Golbat 24 Rematch 4 · ₽230Grimer 26 Weezing 23	₽250	Switch room
Rocket GruntGrunt	Koffing 24 Muk 24	₽240	Switch room
Rocket GruntGrunt	Gloom 25 Gloom 25	₽250	Switch room
Rocket GruntGrunt	Koffing 25 Koffing 25	₽250	Warehouse
Rocket GruntGrunt	Raticate 24 Golbat 24	₽240	Warehouse
Rocket GruntGrunt	Grimer 26 Weezing 23	₽230	Warehouse

Prize money is the trainer class’s base payout times the level of the trainer’s last Pokémon. Trainers with phone rematches call you when they want another battle; their teams grow as you progress.

Items

Item	How	Where
Coin Case	Item ball	Underground passage
Parlyz Heal	Hidden	Underground passage
Super Potion	Hidden	Underground passage
Antidote	Hidden	Underground passage
Smoke Ball	Item ball	Switch room
Full Heal	Item ball	Switch room
Max Potion	Hidden	Switch room
Revive	Hidden	Switch room
Ether	Item ball	Department Store basement
Amulet Coin	Item ball	Department Store basement
Burn Heal	Item ball	Department Store basement
Ultra Ball	Item ball	Department Store basement
Max Ether	Item ball	Warehouse
TM35 Sleep Talk	Item ball	Warehouse
Card Key	Gift From the Radio Tower director held captive in the warehouse.	Warehouse

Hidden items can be found with the Itemfinder from Ecruteak City.

Shops

Herb shop (Saturdays and Sundays)

EnergypowderEnergy RootHeal Powder ₽9,800Revival Herb ₽100

Bargain shop (Monday mornings, one of each)

Nugget ₽4,500Pearl ₽650Big Pearl ₽3,500Stardust ₽900Star Piece ₽4,600

Tips

Pick up the Coin Case from the item ball in the passage; you need it to play at the Game Corner.
On Monday mornings an old man runs a bargain shop selling a Nugget, Pearl, Big Pearl, Stardust and Star Piece.
An herb shop opens on Saturdays and Sundays, selling cheap but bitter medicine that lowers your Pokémon's happiness.
The Haircut Brothers raise happiness: the older one charges ¥500 on Tuesday, Thursday and Saturday, and the younger one ¥300 on Sunday, Wednesday and Friday, each once a day.
In the switch room, the order you flip Switches 1, 2 and 3 decides which shutters open, so experiment if a path stays closed.
Your rival's team here has a Lv 32 starter, Sneasel and Haunter, so heal before you open the basement door.

Walkthrough: Part 4: Ilex Forest, Goldenrod City and Whitney · Part 9: The Radio Tower Takeover and the Legendary Birds

More maps

Goldenrod Underground: Switch room basement — Switch room basement

Goldenrod Underground: Warehouse — Warehouse

FAQ

Where is the Coin Case in Pokémon Gold and Silver?

In an item ball in the Goldenrod Underground passage below Goldenrod City.

How do you solve the switch puzzle in the Goldenrod Underground?

Each of the three switches opens some shutters and closes others, so try different orders; a Grunt hints that the switch on the end is the one to press first.

Where is the Basement Key used?

On the locked door in the Goldenrod Underground. You get the key from the fake Director on Radio Tower 5F, and it leads to the warehouse where the real Director gives you the Card Key.

When is the Goldenrod Underground bargain shop open?

Only on Monday mornings, and you can buy one of each item.

Sources & picture credits

Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances for both versions and all three times of day, fishing, Headbutt and Rock Smash tables, items, trainers, gifts, trades and shops come from the pret/pokegold decompilation (pret/pokegold ef0201d8da). Maps and sprites © Nintendo / Creatures / GAME FREAK, archived from the Bulbagarden Archives; the Johto and Kanto maps are drawn from the game’s own Pokégear graphics (listed on the image gallery).