Part 2: The Cave & Dewford (2nd Gym) - Pokémon Emerald Walkthrough

Things To Do Before the Gym

Talk to Mr. Briney on Route 104 to sail to Dewford Town.
Talk to the Fisherman next to the Dewford Gym to get the Old Rod.
Get HM05 Flash from the Hiker at the entrance of Granite Cave.
Deliver the Letter to Steven Stone deep in Granite Cave.

Granite Cave

Granite Cave is located northwest of Dewford Town. You'll need HM05 Flash to light up the lower floors, but you can find Steven without it if you know the way.

Pro-Tip: Finish the Gym First!

The Knuckle Badge from Brawly is required to use HM05 Flash outside of battle. It is highly recommended to defeat Brawly before exploring Granite Cave's lower dark floors, as navigating them in pitch black is extremely difficult.

Gym Puzzle: The Pitch Black Maze

What is the puzzle: The gym's interior is shrouded in darkness. You can only see a small circle of light immediately surrounding your character.

How to solve: Defeating the gym trainers (Laura, Hideki, Tessa, Cristian) expands your field of vision. Walk straight up, turn right, walk all the way down, then follow the winding corridor to the upper right corner to locate Brawly.

Route 105/106 Route Trainers:

Trainer	Pokémon (Lv)	Type	Strong Against	Weak Against (2x/4x)	Less Effective (0.5x/0.25x/0x)
Sailor Cristian	Wingull (Lv. 11)	Water/Flying	Fire, Ground (Immune), Fighting, Bug, Water	Electric 4x, Rock 2x	Ground 0x, Fighting 0.5x, Bug 0.5x, Steel 0.5x, Fire 0.5x, Water 0.5x
Sailor Cristian	Machop (Lv. 11)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x
Sailor Brenden	Machop (Lv. 12)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x
Fisherman Ned	Tentacool (Lv. 11)	Unknown	Unknown	Unknown	Unknown

Granite Cave Wild Encounters (1F):

Pokémon	Type	Encounter Rate
Zubat (Lv. 6-8)	Poison/Flying	40%
Makuhita (Lv. 7-9)	Fighting	30%
Geodude (Lv. 6-8)	Rock/Ground	20%
Abra (Lv. 6-8)	Psychic	10%

Granite Cave Wild Encounters (B1F/B2F):

Pokémon	Type	Encounter Rate
Aron (Lv. 9-11)	Steel/Rock	50%
Zubat (Lv. 9-11)	Poison/Flying	30%
Sableye (Lv. 9-11)	Dark/Ghost	20%

Granite Cave Checklist:

Escape Rope: Found on 1F.
Everstone: Hidden in B2F in a rock.
TM47 (Steel Wing): Given by Steven Stone after delivering the Devon Letter.

Dewford Town Gym

Dewford Gym is a Fighting-type Gym. Psychic and Flying-types excel here. Dark, Rock, and Ice-types should be avoided.

Dewford Gym Trainers:

Trainer	Pokémon (Lv)	Type	Strong Against	Weak Against (2x/4x)	Less Effective (0.5x/0.25x/0x)
Battle Girl Laura	Meditite (Lv. 13)	Fighting/Psychic	Normal, Fighting, Dark, Rock, Steel	Flying 2x, Ghost 2x	Fighting 0.5x, Rock 0.5x
Black Belt Hideki	Machop (Lv. 13)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x
Battle Girl Tessa	Meditite (Lv. 13)	Fighting/Psychic	Normal, Fighting, Dark, Rock, Steel	Flying 2x, Ghost 2x	Fighting 0.5x, Rock 0.5x
Battle Girl Tessa	Machop (Lv. 13)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x
Sailor Cristian	Wingull (Lv. 13)	Water/Flying	Fire, Ground (Immune), Fighting, Bug, Water	Electric 4x, Rock 2x	Ground 0x, Fighting 0.5x, Bug 0.5x, Steel 0.5x, Fire 0.5x, Water 0.5x
Sailor Cristian	Machop (Lv. 13)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x

Leader Brawly's Pokémon Matchups & Counters

Pokémon (Level)	Type	Strong Against	Weak Against (2x/4x)	Less Effective (0.5x/0.25x/0x)	Top Recommended Counters
Machop (Lv. 16)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x	Ralts, Taillow, Sableye (Immune)
Meditite (Lv. 16)	Fighting/Psychic	Normal, Fighting, Dark, Rock, Steel	Flying 2x, Ghost 2x	Fighting 0.5x, Rock 0.5x	Sableye, Ralts, Taillow
Makuhita (Lv. 19)	Fighting	Normal, Ice, Rock, Dark, Steel	Flying 2x, Psychic 2x	Bug 0.5x, Rock 0.5x, Dark 0.5x	Sableye (Immune), Ralts, Taillow

Top Pokémon to have for this Gym:

Sableye: Can be caught in Granite Cave B1F/B2F. It has Ghost/Dark typing, making it completely immune to all of Brawly's Fighting attacks.
Taillow: Wing Attack deals 2x super effective damage.
Ralts: Psychic attacks easily deal with Machop and Makuhita.

Rewards: The Knuckle Badge and TM08 (Bulk Up).