Out of the four remaining duelists, only those two winning their respective matches in this tower will move on to the final duel atop the Tower
It comes from the 2017 Sun & Moon set, card number 25
You can only use this effect of "Generaider Boss Loot" once per turn
Destroy 1 card on the field, and if you do, you may add 1 Xyz monster from your Extra Deck to your graveyard
This means that cards in the hand are the hardest place to be removed among the public areas (from my perspective), and the fact that it exists in the hand is a much stronger resistance than battle, effect, or targeting resistance
Pikachu ex can be incredibly difficult to stop, especially once the bench is filled with other Electric-type Pokemon