Party: Cloud, Aerith and Red XIII on the mountain; Yuffie, Barret and Tifa in the plant and the mines.
Key unlocks: The Corel side quests, Wizard’s Rod, Twin Viper, Barrage Blaster, Enervation and Revival materia, and Johnny’s inn through The Saga of the Seaside Inn.
Watch for: A lever in the mines: left favours Barret for the date, right favours Yuffie. It is the only choice in the game the walkthroughs point at.
1. Mt. Corel
A rented chocobo, a plateau of chests and a climb.
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1
Rent a chocobo
300 gil in Costa del Sol takes you west. Sunrise Plateau has 2,000 gil, an Emerald and an Ether in chests.
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2
The trails
Cloud, Aerith and Red XIII up the mountain: Wizard’s Rod and Enervation materia hidden along the way.
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3
Custom Valkyrie
At the reactor construction site. Weak to lightning and wind; it sprays fire around the arena and is easiest to pressure during its cooling protocol.
2. The plant and the mines
The other three take the industrial route.
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1
Preparation plant
Yuffie, Barret and Tifa with the grappling hook and lever puzzles. Twin Viper on the ground level of the mines; Barrage Blaster by the cliff edge.
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2
Gigatrice
Weak to fire and poison, and it flies: pressure it while it is airborne, before its elemental cyclone. The mines’ boss.
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3
The lever
Left for Barret, right for Yuffie. Then the minecart with the two of them, breaking boxes for items.
3. North Corel
The town after the reactor.
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1
The lookout
Revival materia on the rooftops of the Settlement Lookout.
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2
Side quests
The Saga of the Seaside Inn opens Johnny’s Treasure Trove (it finishes in chapter 9); Rendezvous in Costa del Sol, Bodybuilders in a Bind and Of Robed Men and Ransoms, whose cave ends with the Amethyst Collar.
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3
To the Gold Saucer
Fast travel is limited through this stretch; finish the region’s business before the ropeway.
4. Bosses
- Custom Valkyrie: Lightning and wind. The cooling protocol is the window.
- Gigatrice: Fire and poison. Airborne is when it is pressured.
5. Before you leave
Cross-checked
Cross-checked on 16 September 2026 against Game8’s Chapter 7 walkthrough (the split, the weapons, the lever) and PowerPyx’s boss guide for Custom Valkyrie and Gigatrice. What is still unverified is the only thing reading cannot settle — nobody here has played it.