If you want to breeze through the event and not worry about clearing all the special challenges that restrict the kinds of cards you can use, Marowak ex and Aerodactyl ex are great starting options when building a deck to counter Pawmot
You can then draw two cards, but you cant battle
It also has background, which means you can tap into white to take advantage of all the many other party and adventure cards in the color combination
Mana Ramp I love having Reckless Barbarian and Patron of the Arts as Dragon cards that you can cast early to provide some temporary mana to power out a big Dragon, or maybe even The Ur-Dragon itself
Save the GX attack for late-game when your opponent least expects the burst damage
(If this card is attached to anything other than a [N] Pokmon, discard this card.) This card provides every type of Energy, but provides only 2 Energy at a time, only while this card is attached to a [N] Pokmon