Twist Mountain — Pokémon Black 2 & White 2
Every wild Pokémon here, by encounter method.
Twist Mountain lists 11 Pokémon across 5 encounter methods (grass (autumn / spring), grass (summer), grass (winter), dust cloud, and more), between level 54 and 68. 3 of them are on no other route's wild tables in this guide: Heatmor, Cryogonal, Regigigas.
Twist Mountain in the official games
The original game's table for this area: