I can touch upon some of the less universally acceptable sideboard cards in my list here
I admit that when I saw the packaging (and before we knew that there would be Collector decks) I ran out and bought stacks of FEA Archon of Coronation and the Scrolls foil Champions of Minas Tirith
Enchantment Whenever you gain life, target opponent loses that much life
If this leaves any Magic: The Gathering finance connoisseurs wondering where to go from here, we at Bleeding Cool have a suggestion for the sake of a valid replacement to Flash: Necromancy
For example, if you know a crucial card is in your Prize Cards, you might prioritize knocking out less valuable Pokmon from your opponent to dig for that card
Sure, if you lose the flip, you're basically down a permanent, but you can circumvent that a bit by weaving this into a deck that actively wants to sacrifice permanents