As long as Aggron ex is your Active Pokémon, your opponent's Basic Pokémon can't attack or use any Poké-Powers or Poké-Bodies.

Split Bomb

Choose 2 of your opponent's Pokémon. This attack doe 30 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.)

Mega Burn100

During your next turn, Aggron ex can't use Mega Burn.