The Goldenrod Underground, which runs under a good half of the city, starts near Bill’s house and ends near the Name Rater’s home. Quite a lot happens there, as detailed below.

Regular Trainers

  • Pokémaniac Daniel, who has two level 11 Slowpoke
  • Pokémaniac Matias, who has a level 12 Lickitung
  • Super Nerd Gibus, who has two level 7 Magnemite, another at level 9 and a level 11 Voltorb
  • Super Nerd Steven, who has two level 11 Grimer
  • A first Burglar with two level 23 Koffing and a level 25 Magmar, and a second one with a level 24 Koffing and a level 26 Growlithe.

 

Team Rocket Trainers

  • Rocket Grunt (male), who has a Muk and a level 24 Koffing
  • Rocket Grunt (male), who has a Muk and a level 23 Koffing, as well as a level 25 Rattata
  • Rocket Grunt (male), who has a level 24 Zubat and a level 25 Raticate
  • Rocket Grunt (male), who has a level 23 Weezing and a level 26 Grimer
  • Rocket Grunt (male), who has two level 25 Koffing
  • Rocket Grunt (male), who has a level 27 Rattata
  • Rocket Grunt (female), who has two level 25 Gloom

 

Stalls

  • The haircutters set up on the upper benches. Their shop is closed on Monday, but one of the two barbers is always there on the other days. The elder is there on Tuesday, Thursday and Saturday and will groom your Pokémon for 500 Poké Dollars. His brother is there on Wednesday, Friday and Saturday and charges 300 Poké Dollars. Having one of your Pokémon groomed by them increases its happiness.
  • On Monday, when the other merchants are absent, a man comes to sell items at a price about 10% lower than normal. Each of the following items can only be bought once a week: Nugget (4500 Poké Dollars), Pearl (650 Poké Dollars), Big Pearl (3500 Poké Dollars), Star Piece (4600 Poké Dollars) and Stardust (900 Poké Dollars).
  • The herbal shop is run by an old lady on the lower bench. It is open on Saturday and Sunday. She sells Heal Powder (450 Poké Dollars), Energy Powder (500 Poké Dollars), Energy Root (800 Poké Dollars) and Revival Herb (2800 Poké Dollars).
  • Where the corridor that used to lead to the Goldenrod Department Store basement was, there is now a Photo Studio where you can have your picture taken dressed as a Rocket member, with your Pokémon. This will help you infiltrate the Radio Tower!

 

On the Lower Level

Below the stalls is the corridor that, in the GSC versions, was at the top of the tunnel. When you obtain the Basement Key, you can access a new room guarded by Rocket Grunts, where you will also meet your rival. He has:

  • His starter (of the type that has the advantage over yours) at level 32 and in its third stage of evolution (except if you chose Chikorita: his Pokémon will then be a Quilava)

Items found here: Full Heal, Smoke Ball, Ultra Ball, Max Ether and TM82 Sleep Talk.