Sinjoh Ruins — Pokémon Heart & Soul
Every wild Pokémon here, by encounter method.
Sinjoh Ruins lists 21 Pokémon across 5 encounter methods (grass, grass, grass, grass, and more), between level 5 and 70. 3 of them are on no other route's wild tables in this guide: Lileep, Anorith, Aerodactyl.
Sinjoh Ruins in the official games
The original game's table for this area:
Opens up at Beat Leader Blue — Viridian City Gym, badge 16. 1 trainer here: