>>41962241remove "Shift" in Gym Battles
Healing is not allowed except from moves in Gym Battles
Brock is sick of your shit and is now a Dragon-type specialist, and his lead is a level 16 Dreepy, which resists all of the starter STABs and is immune to common normal coverage. He will switch to a level 15 Dragonair if you send out something with moves that are neutral vs Dreepy, which will be able to 1v1 anything you send at him at this point, and will switch back to Dreepy if you send out something that cannot hit it at least neutrally.
You will need to train a Rattata, Spearow, Beedrill or Mankey to learn Pursuit in order to take out Dreepy early on, freeing your team up to help take out the Dragonair.
Sure, you can read a guide, and this is still relatively simple, but this is probably enough of a casual filter to disinterest anyone who wants to win without considering an early-game strategy (or just massively overlevelling)