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The Power Plant is right on the other side of this small tunnel, just north of Lavender.

The Rock Tunnel will get you from Lavender Town to Route 10. It is neither complex nor large, so you shouldn't have trouble picking up all the items inside and finding your way out. Make sure you pick up TM 47, Steel Wing, when you first enter the tunnel.

The Rock Tunnel is a simple dungeon with a few interesting items (like TM 47 which contains Steel Wing, a rare Steel-type attack). It's also the only place you'll find Kangaskhan and wild Cubone.

Floor 1[edit]

First floor of the Rock Tunnel

From the bottom entrance (Cerulean City), go up and grab the Elixer on the left, then climb up the stairs onto the raised area and grab the TM 47 (Steel Wing). Return to dirt floor and head to the far right until you reach the wall, then go up and climb down the ladder to Floor 2 (lower-right).

Second visit to Floor 1

From the ladder (center) head left, go up, and climb down the ladder in the northwest corner (upper-left).

Final visit to Floor 1

From the ladder (upper-right) head left (a bit down, then left, then up, then left) to reach the exit. There is a hidden X Accuracy at the back of the dead end path lined by rocks (from the ladder go down, left, up a bit, then right to the end of the dead end).

Items
  • Elixer: down and to the left of TM 47.
  • X Defend: Hidden near the center of the floor, at the end of a dead-end path.
  • Iron (Calcium in Crystal version):
  • X accuracy: hidden in the northeast corner, at the end of a dead-end path.

Floor 2[edit]

Second floor of the Rock Tunnel

From the northwest ladder, head straight down until you reach a dead end surrounded by rocks. Grab the hidden Max Potion along the west edge. Return up a bit, then to the right to a four/five way intersection (depending on how you look at it). Go down to get a PP UP. Return to the intersection and go right a bit, then head up and to the right to get a Revive. Return down to the intersection, head to the right, and climb up the ladder (center).

Second visit to Floor 2

From the ladder (upper-right) head a bit to the right and then down. Half way down the map you will zigzag to the left and down. At the fork, take a left to get an Iron/Calcium. Return to the right and climb up the final ladder (lower-right).

Items
  • Max Potion: hidden near the western edge, at the end of a dead-end path.
  • PP UP: from ladder A go down, right, down to a dead end.
  • Revive: from ladder A go down, right, take the second path up, and then right to the dead end.
  • Iron (Calcium in Crystal version): in the final section between ladders
    C and D you can find this at the end of the path in the southwest corner.

Pokémon Found[edit]

Rock Tunnel 1F encounters
Gold Silver Crystal
Morn Day Night Morn Day Night Morn Day Night
Pokemon 104Cubone.pngCubone 35% 35% 35% 35% 35% 35% 30% 30% N/A
Pokemon 074Geodude.pngGeodude 30% 30% 30% 30% 30% 30% 30% 30% 50%
Pokemon 066Machop.pngMachop 20% 20% 20% 20% 20% 20% 20% 20% N/A
Pokemon 041Zubat.pngZubat 10% 10% 10% 10% 10% 10% 10% 10% 10%
Pokemon 067Machoke.pngMachoke 5% 5% 5% 5% 5% 5% 5% 5% N/A
Pokemon 105Marowak.pngMarowak N/A N/A N/A N/A N/A N/A 5% 5% N/A
Pokemon 093Haunter.pngHaunter N/A N/A N/A N/A N/A N/A N/A N/A 10%
Rock Tunnel B1 encounters
Gold Silver Crystal
Morn Day Night Morn Day Night Morn Day Night
Pokemon 104Cubone.pngCubone 30% 30% 30% 30% 30% 30% 30% 30% N/A
Pokemon 074Geodude.pngGeodude 30% 30% 30% 30% 30% 30% 30% 30% 30%
Pokemon 095Onix.pngOnix 20% 20% 20% 20% 20% 20% 20% 20% 20%
Pokemon 115Kangaskhan.pngKangaskhan 5% 5% 5% 5% 5% 5% 5% 5% N/A
Pokemon 041Zubat.pngZubat 10% 10% 10% 10% 10% 10% 10% 10% 40%
Pokemon 042Golbat.pngGolbat N/A N/A N/A N/A N/A N/A N/A N/A 5%
Pokemon 105Marowak.pngMarowak 5% 5% 5% 5% 5% 5% 5% 5% N/A
Pokemon 093Haunter.pngHaunter N/A N/A N/A N/A N/A N/A N/A N/A 10%
#115 Kangaskhan #104 Cubone
Pokemon 115Kangaskhan.png
You won't see a lot of Kangaskhan here, but it's the only place they show up in Gold, Silver, or Crystal. They haven't changed too much: High HP and good stats, but unexciting moves. It does have one new one, Reversal, which does damage equal to the amount of HP Kangaskhan has lost.
Pokemon 104Cubone.png
Pure Ground Cubone (and it's evolved form, Marowak), now have a third exclusive move: Bone Rush, a solid attack that strikes 2-5 times eash turn. It's Ground-type, too, so it's great against Fire, Electric, Poison, Rock, and even Steel Pokémon. Cubone also gets Bonemerang earlier, and can learn False Swipe (which is great for capturing wild Pokémon).