You need to understand what you want out of these cards: whether you want to play them actively in a Pokmon TCG, collect and keep the rarest, or just buy and flip them for value
From the mid-game onwards, he could easily end up making a suicide attack
Anyways, first off, lemme share with you a couple pictures
My pick: Peter Pan's Shadow - Not Sewn On Kronk - Junior Chipmunk is a bomb reminiscent of Tinker Bell - Giant Fairy, making it very difficult for your opponent to quest without losing half their board
Here are the Charizard ex cards in the Obsidian Flames set and what their market value on TCGPlayer is at the time of writing: As you can see from the table above, the Special Illustration Rare is going for a significantly higher price than the other versions
It's either a super-long, strangely-proportioned centipede cow or a sentient dining table, and I'm not sure which makes more sense for this setting