Strategy
Bulk is the name of the game when playing with this deck, with disruption in the form of Porygon-Z being useful, especially in circumstances where you need to mitigate damage like against Darkrai EX. With Hard Coat and Guarded Grill on Melmetal and Bastiodon, respectively, they can eliminate a lot of damage very quickly, allowing for potential mid to late game setup and insane comebacks.
Dialga EX's Metallic Turbo is amazing, allowing for both Dialga to boost each other's energy as well as help out the rest of the team, and in conjunction with the two Dawns in the deck, you can pretty much control and farm your energy a lot more freely than normal.
If anything were to change, I could see the tools being changed a bit to instead provide two of one instead of one of each, but I'd rather use both rocky helmet and giant cape to provide variety with my playstyle and lean into the bulk and longevity Bastiodon and Melmetal can bring.