While there are two different Mega Pokemon ex in this deck Mega Sharpedo ex and Mega Gengar ex they both work so well together the strongest version of this deck is likely to be a combo of the two
Do all Walls have Defender
"Zombie World" in the Field Zone cannot be destroyed by card effects, also neither player can target it with card effects
lore, despite its common reprints
Another possibility is Desert Sunlight , but that's basically calling off the Battle Phase, so it's not quite as nice (unless you have something like Elemental HERO Rampart Blaster or Total Defense Shogun, which can attack in Defense mode, but what are the chances?)
The McDonald's Pokmon Card Promotion For 2023 Has Ended The limited-time Happy Meal event in McDonald's restaurants was held in the United States from September 12, 2023, until October 16, although individual restaurants around the country ran out of stock of cards much earlier than that