>>35210621Onix has a lower HP stat than Kricketot, a lower Attack than Sentret, lower Special Attack than Spearow, lower Special Defense than Ditto, and lower Speed than Bibarel. Overall, it has a BST of 385, lower than titans such as Ledian, Wailmer and Pachirisu.
All it has is its 160 Defense, which is horribly offset by its 35 HP. For reference, assuming they're both being hit by a physical attack with regular effectiveness, an Onix would take approximately 0.35% less damage than a Pokémon with 95 HP and 95 Defense, such as Bouffalant.