The payoff of this meld pair, doesn't win the game on the spot, and I'd stress that to your Bracket 3 playgroup because while this deck puts together powerful cards, it is not optimized to be unbeatable, and more focused on a huge play with some Golgari death and graveyard interaction molded in
While it didn't show up all that often, it always helped Yugi win the duel when summoned
Will Chittering Doom's ability trigger
Cast the Adventure spell first, exile the card, then bring it back as a land later on
The others are a little more achievable, but keep in mind that all of these will require two copies of the Mewtwo ex card - and they're not easy to get, with certain versions comprising the rarest of the Pokemon TCG Pocket rare cards
Most removal aimed at Pippen is a mana disadvantage thanks to ward