According to Limitless TCG, the Giratina ex and Darkrai ex combination is by far the most used in Pokemon Trading Card Game ...

Alolan Raichu Ex from "Pokémon TCG Pocket's" Celestial Guardians set could destroy the meta—Giratina, Gyarados, and more face instant KOs.

There is a good mix of EX Pokemon and Mega Pokemon ... or Stadium cards your opponent has in play with its Iron Crusher Move. Dont lose sleep over not having the ultimate Darkrai collection.