Like most Pokmon cards, the value of Rayquaza-EX depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Roaring Skies)
after the rare had been moved from the fourth card to the last card in the pack, and before basic lands or ad cards were added behind the rare
Cap Raiser: Leo's Signature Ally, Mitch Brown, essentially doubles the effect of a single ally slot he is assigned to, letting Leo put two Allies on it instead of just one, though at the condition they aren't unique
Toy Vendor can be used as a very searchable discard outlet, enabling some of the deck's GY effects such as Loading
2 booster packs of 18 cards each (1 Ultra Rare for each dorm and 15 Commons)
Shortly thereafter, he Dueled with Crowler against Maximillion Pegasus in an attempt to obtain a job at Industrial Illusions