Construction Site:
You walk around and at the far end of the right, spots the gear and picks it up. You go back to Pyrite.


Pyrite Town:
You return the gear to the windmill generator and get the Colosseum working again. Ginzaru tells you to help him investigate about Miror B. by taking part in the competition. You enter for challenge at the Colosseum:

Karamu - Sandshrew, Noveroach
Isula - Meditate, Natu
Heraat - Electrike, Cacnea, Vulpix
Wacha - Goldeen, Bagon, Magnemite, Delibird

After you beat them and leave the Colosseum, outside on the hanging bridge, a Cipher grunt awaits you to take you to the Pyrite building and give you a present from Miror B.. At the Pyrite Building, the grunt is about to give you a dark pokemon when another grunt recognizes you and battles you:

Cipher Peon - Nore - Yanma (Dark 33), Pineco, Nincada, Surskit

You Snagem the Yanma and pick up a Ein File titled H by the scientist Ein that explains the hyper-state of dark pokemons. You then fight the trainers in the building:

Moni - Phanpy, Trainch, [Vibrabra]
Dikure - Taillow, Hoothoot, [Noctowl]
Lisuto - Larvitar, Noveroach, Carvahna, [Pupitar]
Josta - Magnemite, Remoraid
Mirutsu - Wingull, Wooper
Ben - Voltorb, Electrike
Heep - Doduo, Ledyba, Swablu, [Ledian]
Beet - Spheal, Snorunt, [Sealeo]
Yuro - Horsea, Oddish, Sandshrew, [Gloom], [Seadra]
Hoppu: Tentacool, Cacnea

At the top of the building, you enter the room to find Siruba tied up by two Cipher battlers after his attempt to spy on Miror B.. They both fight you:

Miror B. - Reath: Remoraid (Dark 20), Spinarak, Luvdisc
Miror B. - Ferma - Mantine (Dark 33), Aipom, Furret, Yanma

They flee and you pick up the Ein file titled D, about the dark pokemons. You tell Siruba to wait and enter the cave at the top of the building guarded by another trainer:

Doken: Qwilfish (Dark 33), Goldeen, Linoone, (Corphish)

You enter the Pyrite Cave and battle trainers inside as you find you way down to Miror B.'s hideout:

Stakku - Anorith, Lotad
Bibu - Ralts, Koffing, Shroomish, [Kirlia]
Twan - Meditite (Dark 33), Bagon, Numel, (Machop), [Shellgon], [Camerupt]
Stra - Lotad, Lotad, Lotad, Lotad, [Lombre]
Bibaru - Lotad, Geodude, Snorunt, Slakoth, [Graveller]
Feruma: Whismur, Lotad, Slakoth, [Loudred], [Lombre]
Sosh - Dunsparce (Dark 33), Mareep, Cacnea, (Jigglypuff)
Alek - Lotad, Lombre, [Lombre]
Regato - Pineco, Shuppet, Koffing, [Foretress]
Zalo - Swablu (Dark 33), Lotad, Beldum, Lombre, [Loudred]
Hamony - Zigzagoon, Zigzagoon, Linoone, [Linoone]
Suza - Natu, Tentacool, Teddursa

Cipher Peon - Sotto - Lileep, Spheal, Dustox, [Sealeo]

You enter Miror B.'s hideout and see him dacing with his Ludicolos. He battles you:

Cipher Admin - Miror B. - Ludicolo, Ludicolo, Ludicolo, Ludicolo, Sudowoodo (Dark 35)

Miror B. flees and you save Plusle in the other room. Ginzaru comes in and thanks your help. You all head back to Ginzaru's place and Ginzaru takes your P*DA mail number to inform you of updates. He also gives you Plusle to help on your journey.

Before you leave the town, the fortune teller lady Vidi tells you of a place far north where you'll be able to learn about reviving dark pokemons. Mirei realizes it must be Agate Village, where her grandparents live. You head there.