pokemon booster box black bolt Pokémon Trading Card and White Flare (Pair Box) – Calipokehouse (Each booster pack contains 10 game cards and 1 Basic Energy Black Bolt Booster Pack -

Shaymin V G - Wing Flap 30 GC - Revenge Burst 60+ This attack does 40 more damage for each Prize Card your opponent has already taken

Although a Song is only played once and discarded, it has a low enough cost that it would be easy to use multiples of these

Darkuriboh X DARK Level 1 [ FiendEffect ] ATK 300 DEF 200 When a Fiend monster(s) and/or Fusion Monster(s) you control are targeted for an attack, or a card or effect is activated that targets them (Quick Effect): You can discard this card, then target 1 of those monsters

"The slogan is 'gotta catch 'em all' and that's what we've tried to do," Owen Gray told Guinness World Records

And its just snowballed since then

This all fits with how Maylenes character is portrayed in the games