Rock Tunnel HGSS · Kanto Area
Rock Tunnel is a pitch-dark cave in eastern Kanto, cutting through the mountains on Route 10 between the Pokémon Center near the Power Plant and Lavender Town to the south. It has two floors linked by ladders. Without a light source you can barely see, so Flash makes it far easier.
- Region
- Kanto
- Wild Pokémon
- 8
- Items
- 10
- Trainers
- 0
- HMs
- Rock Smash, Rock Climb
Connects to: Route 10
Rock Tunnel on the Kanto Pokégear map
Wild Pokémon
1F
| Pokémon | Type | Lv. | Morning | Day | Night |
|---|---|---|---|---|---|
 Cubone | Ground | 10–13 | 35% | 35% | 35% |
 Geodude | RockGround | 10 | 30% | 30% | 30% |
 Machop | Fighting | 12 | 20% | 20% | 20% |
 Zubat | Poison | 8 | 10% | 10% | 10% |
 Machoke | Fighting | 14 | 5% | 5% | 5% |
B1F
| Pokémon | Type | Lv. | Morning | Day | Night |
|---|---|---|---|---|---|
| Geodude | RockGround | 12 | 30% | 30% | 30% |
| Cubone | Ground | 12 | 30% | 30% | 30% |
 Onix | RockGround | 16 | 20% | 20% | 20% |
| Zubat | Poison | 10 | 10% | 10% | 10% |
 Marowak | Ground | 14 | 5% | 5% | 5% |
 Kangaskhan | Normal | 14 | 5% | 5% | 5% |
| Pokémon | Type | Lv. | Chance |
|---|---|---|---|
| Geodude | RockGround | 12–21 | 100% |
Chances are the game’s encounter slots: grass and caves 20/20/10/10/10/10/5/5/4/4/1/1, with every slot changing by time of day (morning 4:00–9:59, day 10:00–19:59, night 20:00–3:59); surfing 60/30/5/4/1; all three rods 40/30/15/10/5; Rock Smash 80/20; Headbutt 50/15/15/10/5/5. HG and SS mark Pokémon found in only one version. Where to find every Pokémon.
Items
| Item | How | Where |
|---|---|---|
| Elixir | Item ball | 1F |
| TM56 Fling | Item ball | 1F |
| X Defend | Hidden | 1F |
| X Accuracy | Hidden | 1F |
| Iron | Item ball | B1F |
| PP Up | Item ball | B1F |
| Revive | Item ball | B1F |
| Oval Stone | Item ball | B1F |
| Max Potion | Hidden | B1F |
| HP Up | Hidden | B1F |
Hidden items can be found with the Dowsing MCHN Pokégear app.
Tips
- Flash is TM70 in HeartGold and SoulSilver, not an HM, but you still need it to light up the cave.
- TM56 Fling is on 1F, and B1F has a PP Up and a Revive.
- Rock Climb opens side chambers on B1F with an Iron, an Oval Stone and a hidden HP Up.
- Kangaskhan appears on B1F at 5%, alongside Marowak and Onix.
- Cubone is the most common catch on 1F at 35%.
- Rock Smash the boulders on B1F for Geodude and items.
Walkthrough: Part 17: Lavender Town, the Power Plant and Misty
More pictures
FAQ
Do you need Flash for Rock Tunnel in HeartGold?
It isn’t required, but the cave is pitch black without it. Flash is TM70 in HeartGold and SoulSilver.
Where can you catch Kangaskhan in HeartGold and SoulSilver?
On B1F of Rock Tunnel, at a 5% rate.
How do you get the items in Rock Tunnel’s side rooms?
Some B1F chambers need Rock Climb; they hold an Iron, an Oval Stone and a hidden HP Up.
What Pokémon can you catch in Rock Tunnel in HeartGold and SoulSilver?
8 species: Cubone, Geodude, Machop, Zubat, Machoke, Onix, Marowak, Kangaskhan.
Sources & picture credits
Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances, items, trainers, rematch teams, gifts and shops come from the pret/pokeheartgold decompilation, and the Pokémon sprites and dungeon entrance pictures are drawn from the game’s own graphics in it. The position maps are the Gold/Silver wiki’s Pokégear map renders. Location pictures and trainer sprites © Nintendo / Creatures / GAME FREAK, archived from the Pokémon Wiki on Fandom (listed on the image gallery).