Whirl Islands — Pokémon Crystal
Every wild Pokémon here, by encounter method.
Whirl Islands lists 11 Pokémon across 21 encounter methods (grass (morning), grass (night), grass (morning), grass (night), and more), between level 10 and 60. 4 of them are on no other route's wild tables in this guide: Seel, Horsea, Seadra, Lugia.
Whirl Islands in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.
The original game's table for this area:
