Route 21
Pokemon FireRed
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
 Gyarados | 15-25 | Fishing with a Super Rod | 15% |
 Horsea | 5-15 | Fishing with a Good Rod | 60% |
| Horsea | 15-25 | Fishing with a Super Rod | 80% |
 Krabby | 5-15 | Fishing with a Good Rod | 20% |
 Magikarp | 5 | Fishing with an Old Rod | 100% |
| Magikarp | 5-15 | Fishing with a Good Rod | 20% |
 Psyduck | 25-35 | Fishing with a Super Rod | 1% |
 Seadra | 25-35 | Fishing with a Super Rod | 4% |
 Tangela | 17-28 | Walking in tall grass or a cave | 100% |
 Tentacool | 5-40 | Surfing | 100% |
Pokemon LeafGreen
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
| Gyarados | 15-25 | Fishing with a Super Rod | 15% |
| Horsea | 5-15 | Fishing with a Good Rod | 20% |
 Kingler | 25-35 | Fishing with a Super Rod | 4% |
| Krabby | 15-25 | Fishing with a Super Rod | 80% |
| Krabby | 5-15 | Fishing with a Good Rod | 60% |
| Magikarp | 5-15 | Fishing with a Good Rod | 20% |
| Magikarp | 5 | Fishing with an Old Rod | 100% |
 Slowpoke | 25-35 | Fishing with a Super Rod | 1% |
| Tangela | 17-28 | Walking in tall grass or a cave | 100% |
| Tentacool | 5-40 | Surfing | 100% |