Hey there!
I am sorry for the inconvenience you are experiencing. From what I understood, you already managed to beat Lawrence IV, is that correct? What you are having a difficult time with is the battle after that, against Zapdos and Moltres. In order to beat them, the easiest way is using a Chansey with an Eviolite on it with the following moves: Softboiled, Toxic, Seismic Toss
Use Toxic against Zapdos and Moltres and heal up using Softboiled when you are at low HP. Please let me know if this strategy is working for you. Have a nice day.
Kind regards, Noxious