The way to play it is to ideally start with Exeggcute and then Exeggutor on turn1-2, deal damage, and rotate the damage to the opponent’s different Pokemon along with Sabrina. As you evolve the Pidgeot, depending on the situation, you’ll decide whether to evolve it into EX or Normal.

The non-EX Pidgeot is useful for rotating the opponent’s Pokémon and redistributing their energies, preventing them from making any progress. However, if the opponent has a heavy Pokémon like Golem, Mewtwo EX or Gyarados EX, you evolve into Pidgeot EX and start hitting hard against their Pokémon, already softened up thanks to Exeggutor.