Yellow Rock Tunnel
Pitch black without Flash, this winding cavern hides Onix and Geodude on the path toward Lavender Town.
Rock Tunnel is in Kanto, with Route 9 to the west. In the story you arrive from Route 10 to the south and it comes before Lavender Town.
ROCK TUNNEL MAP
Two unlit floors twist between the Route 10 entrance and the Lavender side, dark enough that Flash is essential to see at all. It is also the only land link between the two, with no way around it.
Rock Tunnel Walkthrough
1F
- From the entrance, head east and south, where a PokéManiacPokéManiac₱1,150
CuboneLv 23
SlowpokeLv 23Weak toWaterGrassIceElectricBug battles you with Cubone and Slowpoke. - Follow the long passage east, then north to the northeast ladder down to B1F.
B1F
- From the landing, go south and west beneath a PokéManiac, who battles you with his lone Slowpoke.
- At the west end turn north, where a Jr. Trainer battles you with Oddish and Bulbasaur.
- Wind east and north, where a Hiker spots you with his lone Geodude, then climb the north ladder.
- Back on 1F, a Hiker with Machop and three Geodude battles you below the landing; head south and east, then north to the next ladder down.
- On B1F, a Jr. Trainer challenges you with Jigglypuff, Pidgey and Meowth, then a Hiker battles you with two Geodude and a Graveler before the northwest ladder.
Highest-level fight · fight 1PokéManiacSlowpokeLv 25₱1,250SlowpokeLv 251F
- Go south down the east side, where a Jr. Trainer battles you with Bellsprout and Clefairy and another spots you with Pidgey, two Rattata and Bellsprout.
- Turn west along the bottom passage, where a Jr. Trainer battles you with Meowth, Oddish and Pidgey, then walk south out to Route 10.
Pokemon Encounters
Onix is the eye-catching grab at 10 percent, a long Rock snake that walls early attackers. Machop shows at 10 to 20 percent for an early Fighting-type, and the dark fills the gaps with Geodude and Zubat, levels 14 to 22.
Zubat
Also found in 3 other locations
TRAINERS
This pitch-black tunnel packs fifteen battles end to end, Hikers leading with Rock and Ground teams that reach level 25. PokeManiacs bring heavier hitters, and the dark turns every step into a surprise.
Hiker
Rock Tunnel Guide
Onix shows up at about one in ten among the Zubat and Geodude, so expect to search. As a Rock and Ground type it ignores Pikachu's Electric moves entirely, a handy early catch when your starter keeps whiffing.
Save it for Rock Tunnel and skip it everywhere else. That's the one cave the game leaves unlit, and pushing through blind while Zubat swarm you is rough. No other cave is dark, so Flash is otherwise a wasted move slot. Grab HM05 from Oak's Aide and hand it to a benched Pokemon just before that descent.
There's only Victory Road. Cerulean Cave would be the other option, but it stays locked until you're Champion. Since you climb Victory Road on the way to the League anyway, a lap or two there doubles as a final tune-up.