Seafoam Islands — Pokémon Aesthetic Red
Every wild Pokémon here, by encounter method.
Seafoam Islands lists 21 Pokémon across 6 encounter methods (grass / cave, surf, old rod, good rod, and more). 2 of them are on no other route's wild tables in this guide: Jynx, Articuno.
Seafoam Islands in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.