Route 20 Crystal · Kanto route
Route 20 is a sea route between Cinnabar Island and Route 19, passing the Seafoam Islands. In Pokémon Crystal the cave on Seafoam is where Blaine runs his temporary Gym after the volcano destroyed Cinnabar Gym. Three Swimmers patrol the water, and the Super Rod hooks Chinchou, Shellder and Lanturn.
- Wild Pokémon
- 6
- Items
- 0
- Trainers
- 3
- Needs
- Surf
Connects to: Cinnabar Island · Route 19 · Seafoam Islands
Route 20 on the Kanto map
Wild Pokémon
| Pokémon | Type | Lv. | Chance |
|---|---|---|---|
 Tentacool | WaterPoison | 30–35 | 90% |
 Tentacruel | WaterPoison | 35 | 10% |
| Rod | Pokémon | Lv. | Morning & day | Night |
|---|---|---|---|---|
| Old Rod |  Magikarp | 10 | 85% | 85% |
| Tentacool | 10 | 15% | 15% | |
| Good Rod | Tentacool | 20 | 35% | 35% |
| Magikarp | 20 | 35% | 35% | |
 Chinchou | 20 | 20% | 20% | |
 Shellder | 20 | 10% | 10% | |
| Super Rod | Chinchou | 40 | 40% | 40% |
| Shellder | 40 | 30% | 30% | |
| Tentacruel | 40 | 20% | 20% | |
 Lanturn | 40 | 10% | 10% |
Chances are the game’s encounter slots for each time of day: morning 4:00–9:59, day 10:00–17:59, night 18:00–3:59 (grass and caves 30/30/20/10/5/4/1, surfing 60/30/10). Where to find every Pokémon · Crystal vs Gold & Silver.
Trainers
| Trainer | Pokémon | Prize |
|---|---|---|
 Swimmer♀Nicole |  Marill 29Marill 29 Lapras 32 | ₽160 |
| Swimmer♀Lori |  Starmie 32Starmie 32 | ₽160 |
 Swimmer♂Cameron | Marill 34 | ₽68 |
Prize money is the trainer class’s base payout times the level of the trainer’s last Pokémon. Trainers with phone rematches call you when they want another battle; their teams grow as you progress.
Items
No items to pick up here.
Tips
- Blaine’s temporary Gym is inside the Seafoam Islands cave entrance on this route.
- Entering Route 20 clears the boulders that block Route 19, opening the sea route to Fuchsia City.
- The Super Rod catches Lanturn at Lv40 with a 10% rate and Chinchou at 40%.
- Swimmer Nicole uses two Marill and a Lv32 Lapras.
Walkthrough: Part 20: Seafoam Islands, Cinnabar Island and Blaine
FAQ
Where is Blaine’s Gym in Pokémon Crystal?
In the Seafoam Islands cave on Route 20. A sign outside reads ‘Cinnabar Gym Leader: Blaine’.
How do you get to Route 20 in Crystal?
Surf south from Pallet Town along Route 21 to Cinnabar Island, then head east. From Fuchsia, Route 19 is blocked until you have done this once.
What Pokémon can you catch in Route 20 in Pokémon Crystal?
6 species: Tentacool, Tentacruel, Magikarp, Chinchou, Shellder, Lanturn.
Sources & picture credits
- Route 20 (Bulbapedia)
- pret/pokecrystal (decompiled game data and graphics)
- Map drawn from maps/Route20.blk
Guide text is original retrogameindex writing, checked against the game’s own scripts and Bulbapedia. Wild Pokémon and encounter chances for all three times of day, fishing, Headbutt and Rock Smash tables, items, trainers, gifts, trades and shops come from the pret/pokecrystal decompilation (pret/pokecrystal 3bc8daa417). Maps, sprites and the Johto and Kanto Pokégear maps are drawn by retrogameindex from the game’s own graphics in that decompilation (listed on the image gallery). Pokémon © Nintendo / Creatures / GAME FREAK.