Claydol is already a main set up card in any deck. especially PLOX, GG, blah. Bronzong is a good card, but do you really need it concidering you already:
1. Shut off powers.
2. Do massive damage.
3. Are consistent at least.
AND
4. Already have so many techs possible, it isn't funny.
Now, what matchup will Bronzong help? Gardevoir, right? Sure, for one turn, then they knock you out.