Due to this, you must first finish 'Complete the Kanto Pokdex!' Secret Mission if you want to complete 'The Immersive 4' is, at the time of writing, the only way to obtain the Immersive Mew card
SR Super Rare Heavy Slump X TRAP If your opponent has 8 or more cards in their hand: They shuffle their entire hand into the Deck, then draw 2 cards
This card provides a lot of value for only three mana, first generating a 2/2 Goblin token, which then has the power to create treasure tokens, then enabling you to discard up to two cards to draw the same amount and then transforming into a 2/2 Goblin with a similar ability to the iconic Kiki-Jiki, Mirror Breaker
If this isnt convincing enough, Gardevoir ex saw a commanding domination of Japans ADV1 to PCG9 sets, which equated to our ex: Ruby & Sapphire through ex: Power Keepers (RS-PK) format due to similar reasons: being able to use Imprison to lock down your opponents board, creating inescapable board states while slowly grinding out damage and taking prize cards
Gimmick Puppet Parade can be Set from the Deck using the effects of cards like Lilith, Lady of Lament or Trap Trick, while you can use the effects of cards like Performapal Popperup or Kuriphoton to reduce your LP to allow for a huge comeback