GET A FREAKING ZUBAT IF YOU WANT TO SOLVE MOST OF YOUR PROBLEMS IN JOHTO
I started another Johto run and went up against the dreaded Whitney and won, with just a single Zubat named Demise. This proves that Whitney isn't as hard as she seems because of 4 key factors. 1. Demise is a male 2. No status moves were ever used on Clefairy or Miltank 3. No healing at all 4. It oneshotted them with Wing Attack