He's been playing Pokemon TCG competitively for three years, placing high in multiple city, regional, state, and national tournaments, and peaking with a 2nd place finish at the 2013 World Championships in the Masters Division -- not to mention he placed 7th in this year's Worlds last weekend with his Donphan deck
Due to unfortunate game-balancing choices over the years, Dragon-type cards have become some of the most aggravating meta threats to deal with in the Pokmon Trading Card Game
Lifegain is one of the best-supported archetypes in Magic, and Heliod is the best lifegain commander thanks to the constant stream of value and combo potential
Mewtwo ex decks will slot in Mew ex for the same reason, to have more control in the mirror match, and this already appears to be having a positive effect on the Pokmon TCG Pocket meta by injecting some diversity
I cant search for alternate art, or even filter out reprints/first-time prints