The Rock Tunnel Connects Route 10 to Lavender Town. To get through, it is very useful to have a Pokémon that knows HM05 - Flash.
If you picked Squirtle or Bulbasaur as your starter and leveled it up decently, you'll have little problem getting through. Those who picked Charmander as their starter will struggle though, as the Rock types here are super effective against Fire types, though its move Metal Claw should make things easier.
Pick up as many Super Potions as you can in Vermillion City, as you'll be using them. For now, worry about getting to the other side and come back for the items/Pokemon later once you have a stronger team.
Rock Tunnel
On the second level, in the southwest corner, there is a Move Tutor who will teach your Pokémon Rock Slide.
Items
- Max Ether (North of Picnicker Sofia and Hiker Dudley)
- Revive (B1F; southwest corner)
- Escape Rope (Southeast of Hiker Lucas)
- Pearl (North of Picnicker Dana)
- Repel (1F; northeast corner)
Pokémon
| FireRed and LeafGreen | |||
|---|---|---|---|
| Pokémon | Level | Rate | |
|
Zubat | 15-16 | 30% |
|
Mankey | 16-17 | 15% |
|
Machop | 16-17 | 15% |
|
Geodude | 15-17 | 35% |
|
Onix | 13-17 | 5% |
Trainers
| FireRed and LeafGreen | |
|---|---|
| Trainer | Pokemon |
 Pokemaniac Ashton Reward:  1104 |
|
Pokemaniac Winston Reward: 1200 |
|
 Picnicker Martha Reward: 440 |
|
Pokemaniac Steve Reward: 1056 |
|
 Hiker Allen Reward: 900 |
|
Hiker Eric Reward: 720 |
|
Hiker Lenny Reward: 684 |
|
Hiker Oliver Reward: 720 |
|
Hiker Lucas Reward: 756 |
|
Picnicker Sofia Reward: 420 |
|
Hiker Dudley Reward: 756 |
|
Pokemaniac Cooper Reward: 960 |
|
Picnicker Leah Reward: 440 |
|
Picnicker Ariana Reward: 380 |
|
Picnicker Dana Reward: 400 |
|
New Pokémon
As the second Fighting type Pokemon you can catch in the game, Machop is a great replacement for a Mankey if you caught one earlier. Machop will work wonders for a long part of the game, but you may choose to replace him afterwards with Hitmonlee or Hitmonchan.
He gets tons of Fighting type moves and evolves twice, first into Machoke at level 28, and then to Machamp after being traded.
Onix is the second Rock type Pokemon you encounter in the game following the Geodudes you ran into inside Mt. Moon. Although not as well rounded as a fully evolved Golem, Onix's Defense stat is unmatched. In addition, he receives Dragon Breath at level 30 and Iron Tail, at level 45, making him a contender for use against Lance's Dragons in the Elite Four.
However, be sure to remember that Onix's Rock/Ground types make it extremely weak against Water and Grass Pokemon. Onix will evolve into Steelix when traded holding a Metal Coat. This cannot happen until beating the Elite Four however.
Route 10
You will exit Rock Tunnel on the south side of Route 10.
Trainers
| FireRed and LeafGreen | |
|---|---|
| Trainer | Pokemon |
Picnicker Carol Reward: 420 |
|
Hiker Clark Reward: 756 |
|
Hiker Trent Reward: 684 |
|
Pokemaniac Herman Reward: 960 |
|
