AG190: Gathering the Gang of Four!

Plot
Ash trades in some of his old Pokemon and brings Bulbasaur, Charizard and Squirtle back. They head up into the mountains for a little training and reminiscing of the past. After stopping yet another Pikachu stealing attempt from Team Rocket, Ash runs into Brandon who is impressed by the four Pokemon. Brandon declares a four-on-four battle this time, so he can see the true strength of the four. Ash agrees, and the next day, the battle begins. Brandon chooses Dusclops and Ash chooses Charizard. Will he finally be able to win?