|Zubat||Poison/Flying||1F/B1F/Horde||40% (1F), 60% (Horde), 30% (B1F)|
|Abra||Psychic||1F/B1F||15% (1F), 20% (B1F)|
|Geodude||Rock/Ground||1F/1F Horde||5%, 35% (Horde)|
|Makuhita||Fighting||1F/B1F/Horde||40% (1F), 35% (Horde with Geodude), 5% (Horde), 20% (B1F)|
|Aron||Steel/Rock||B1F/Horde||30% (B1F), 40% (Horde)|
There’s not much of particular note in Granite Cave. Abra makes a decent Psychic Pokémon with some great sweeping capabilities if you didn’t get Ralts back on Route 102. Not much aside from this.
Heal up after the Gym and then go north and west into Granite Cave.
Granite Cave - 1F
Go along the path before you for a bit. If you didn’t get the Flash TM while you were here last, do so now by speaking with the Hiker and also teach it to someone if you want, though you don’t need it immediately. (Abra, for example.) Then head north and downstairs.
Granite Cave - B1F
Here, you’ll quickly walk up to the silver-haired man, Steven Stone. After a bit of a rant from him, he’ll accept your Letter and, in return, you’ll be given TM51 (Steel Wing).
After more chatting, he’ll leave. And, unlike Ruby/Sapphire, there’s nothing else for you here at the moment (at least not until you get the Mach Bike), so leave.
Once back here, speak with Mr. Briney and opt to head to Slateport.