The rock tunnel can be found by the power plant (east of Cerulean City. You have to cut a tree to get to the path and then follow the path and you will find the entrance to the rock tunnel right next to a Pokemon Center). The rock tunnel leads to Lavender Town.
Onix, Geodude, Paras, Graveller, Cubone (If you're lucky. :P) and Zubat.
rock tunnel
Pokemon crystal? Well...in Pokemon Diamond it's a stone dice that powers up rock type moves.
The powerplant is in the same spot it's in, in Red, Blue, Yellow, Gold, Silver, Crystal, Fire Red, Leaf Green, Heart Gold, and Soul Silver. East of Cerulean City, south of Rock Tunnel. You need to surf to get to it.
Go east from cerulean city keep going until you reach water go south and into the cave this is Rock Tunnel.
Well, you need to capture atleast 10 Pokemon, go to the diglett tunnel in vermillion city then when you reach the end, get out of the diglett tunnel and go down, talk to everyone and one of them is an aide which will give you HMflash, you need to have a Pokemon who can use flash and you can use that to get outta rock tunnel.
Rock tunnel Uncommon
It is in Rock Tunnel.
rock tunnel
rock tunnel
Rock Tunnel on the first floor but it only has a 5% chance of finding one.
You can find it in the rock tunnel, but it is rather rare.
Rock tunnel, Six island.
You can find Machop at Rock Tunnel and Victory Road.
In Johto you can find it in the Safari zone and in Kanto you can find it in Rock tunnel.
Rock Tunnel (Uncommon) and Route 10 (Uncommon).
you can find zapdos in the power plant just below the rock tunnel
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