One Island
Pokemon FireRed
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
 Gyarados | 15-25 | Fishing with a Super Rod | 15% |
 Horsea | 5-15 | Fishing with a Good Rod | 80% |
| Horsea | 15-25 | Fishing with a Super Rod | 40% |
 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% |
 Shellder | 15-25 | Fishing with a Super Rod | 40% |
 Tentacool | 5-40 | Surfing | 95% |
 Tentacruel | 35-40 | Surfing | 5% |
Pokemon LeafGreen
| Pokemon | Levels | Method | Rarity |
|---|---|---|---|
| Gyarados | 15-25 | Fishing with a Super Rod | 15% |
 Kingler | 25-35 | Fishing with a Super Rod | 4% |
 Krabby | 15-25 | Fishing with a Super Rod | 40% |
| Krabby | 5-15 | Fishing with a Good Rod | 80% |
| 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% |
 Staryu | 15-25 | Fishing with a Super Rod | 40% |
| Tentacool | 5-40 | Surfing | 95% |
| Tentacruel | 35-40 | Surfing | 5% |