South Johto Sea (Route33south 2) — Pokémon Soulgold
Every wild Pokémon here, by encounter method.
South Johto Sea (Route33south 2) lists 5 Pokémon across 4 encounter methods (surf, old rod, good rod, super rod), between level 5 and 45. 2 of them are on no other route's wild tables in this guide: Shellos (Shellos East), Phione.
Opens up at Post-game — the wider world.