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That seems like a good entry for the Top Ten Combo Decks of All Time, and it featured Memory Jar

It requires three energies and deals a total of 130 damage

Mewtwo V-Union (Sword and Shield Promo): This is not exactly a tech card since it forces you to build your deck in an entirely different way but if you are able to set up a Mewtwo V-UNION, you should have a very favored matchup against Lost Box all of the sudden

Furthermore, it still sees play in some formats today, as it can make powerful XYZ boss monsters like "Toadally Awesome"

Since then, The Pokmon Company has released several expansion booster packs and run a series of different events

Pikachu C: Master Ball Mirror 025/165 While technically not registered in the set list, the Master Ball Mirror variant exists in Pokmon Card 151 as a reverse holo