Red/Blue Brock Without Bulbasaur or Squirtle

Build the answer

Raise Caterpie to Butterfree and use Confusion, or bring a Nidoran with enough levels to survive Rock Tomb's predecessor moves. Charmander's Ember is resisted, so it should not carry the plan alone.

Control damage

Geodude and Onix have high Defense but weak Special. Special attacks and status are more efficient than repeated Normal hits.