Don't get what could possibly even appear wrong with any of those three.-Black Glasses Bisharp.
-Shuca Berry Aegislash.
-Superpower Deoxys-D.
Black Glasses Bisharp is pretty obvious, it's a *1.2 boost to any Dark attack, aka your entire moveset besides Iron Head. It's also a badass image if you think about it(though not as Black Glasses Diggersby).
Shuca Berry Aegislash also looks pretty decent since Aegislash is huge Ground bait. It was used on Jirachi last gen for the exact same reason. I get that Air Balloon looks better, but Shuca has the advantage of hiding until Aegislash is actually hit by a ground move.
Superpower is used on Deo-D for the purpose of KO Tyranitar and Bisharp in order to prevent them from stopping your hazardfest.