Once Summoned, they can both remove up to 3 opposing cards and Special Summon a Spirit monster ignoring its Summoning conditions (typically "Amano-Iwato", which will stay on the field), and after they return to the hand in the End Phase, will float into two tokens
One of the things Im testing in those spots is a few Traps
Dex Pokdex Expansions Search News Help Get Started Sobble Cards 10 Cards Search Language Number of Cards 10 Most Recently Seen In Mega Evolution: Mega Evolution Market Value 38.23 Most Expensive Sobble on the Ball 28.03 Sobble 3.22 Sobble 3.06 Distribution by Rarity
As for the field parts, from the Deck selection screen we can see: that the field parts seem to be the parts of the field that let you access the GY and banished cards menus, like this one: As previously reported, you will be able to find public Decks to use as reference
Make sure you also have a Mewtwo EX card in your deck since youll need to play that before you can use Mega Mewtwo EX