Well what stat increasing item? This is obviously for a competitive team of some sort and the only held items that boost special defense (that I’m aware of) is an Eviolite which doesn’t work for obvious reasons and an Assualt vest which would stop him from using dragon dance
The only reason kyurem black got into ubers is 170 attack and it got a speed increasing move aka dd assault vest would prevent that and make me die to literally every super effective physical move
You dont need to be a competitive pokemon guy to know what assault vest is. this poll is obviously for competitive teams so why bother if you dont know competitive also AV disables all non attacking moves.