Rock Tunnel
Pokemon Red and Blue
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
 Geodude | 16-18 | Walking in tall grass or a cave | 51% |
 Machop | 15-17 | Walking in tall grass or a cave | 30% |
 Onix | 13-17 | Walking in tall grass or a cave | 14% |
 Zubat | 15-18 | Walking in tall grass or a cave | 105% |
Pokemon Yellow
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
| Geodude | 16-21 | Walking in tall grass or a cave | 70% |
| Machop | 17-21 | Walking in tall grass or a cave | 30% |
| Onix | 14-22 | Walking in tall grass or a cave | 10% |
| Zubat | 15-22 | Walking in tall grass or a cave | 90% |
Pokemon FireRed and LeafGreen
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
| Geodude | 15-17 | Walking in tall grass or a cave | 70% |
| Geodude | 5-30 | Smashing rocks | 95% |
 Graveler | 25-40 | Smashing rocks | 5% |
| Machop | 16-17 | Walking in tall grass or a cave | 25% |
 Mankey | 16-17 | Walking in tall grass or a cave | 30% |
| Onix | 13-17 | Walking in tall grass or a cave | 15% |
| Zubat | 15-16 | Walking in tall grass or a cave | 60% |
Pokemon HeartGold and SoulSilver
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
 Absol | 10-12 | Walking in tall grass or a cave | 40% |
 Bronzor | 10-12 | Walking in tall grass or a cave | 40% |
 Chingling | 12-16 | Walking in tall grass or a cave | 40% |
 Cubone | 10-13 | Walking in tall grass or a cave | 65% |
| Geodude | 10-12 | Walking in tall grass or a cave | 60% |
| Geodude | 12-21 | Smashing rocks | 100% |
 Kangaskhan | 14 | Walking in tall grass or a cave | 5% |
 Machoke | 14 | Walking in tall grass or a cave | 5% |
| Machop | 12 | Walking in tall grass or a cave | 20% |
 Makuhita | 12-16 | Walking in tall grass or a cave | 40% |
 Marowak | 14 | Walking in tall grass or a cave | 5% |
| Onix | 16 | Walking in tall grass or a cave | 20% |
| Zubat | 8-10 | Walking in tall grass or a cave | 20% |