Chaos Confetti was designed by Jeff Donais, Pro Tour head judge
Theres an extremely easy answer: any of them
Like most Pokmon cards, the value of Counter Catcher depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Paradox Rift)
Its rarity is bolstered by the unique promotional nature and distribution method, which required collectors to engage actively with the product at the time, leading to fewer surviving examples in mint condition
Get ready to be pumped, my friends
Kangaskhan was one of the original Mega Evolutions from the XY era and an original Kanto Pokemon, giving this card the new-form and nostalgia double whammy that collector audiences consistently respond to