Check out the picture of the Dragonite Ex to see the size comparison of a regular Pokemon card versus an OVERSIZED one
It's possible to play without creating a Trainer Club profile, and progress is saved when you're a Guest, but to access all the game's features, a profile is required
When cards that were previously included in set that has rotated are reprinted in a set that is currently legal in the Standard Format, the new print of the older card often makes older printings of the same card legal in the Standard Format again
You'll end up absorbing them all through osmosis eventually, but this list should make things easier
It comes at the cost of recoil damage, however, so careful decision-making and analysis could prove vital when piloting this deck
Downsides aside, this is a super fun card to cast