When you use Buzzwole ex’s attack “Big Beat,” it applies an effect that prevents Buzzwole ex from using "Big Beat" on your next turn.
However, according to game rules, any effects on a Pokémon are removed when it moves to the Bench. By using this rule, you can reset the restriction and use "Big Beat" again on the following turn.
Example:
1. Use Buzzwole ex’s "Big Beat."
2. On your next turn, move Buzzwole ex to the Bench (e.g., using Celesteela’s Ability "Ultra Thrusters").
3. The restriction from "Big Beat" is cleared when Buzzwole ex moves to the Bench.
4. Bring Buzzwole ex back to the Active Spot (e.g., by retreating your Active Pokémon).
5. Buzzwole ex can now use "Big Beat" again.