For starters, players only get four cards from a single Deluxe Pack Ex pack, whereas any other set would reward players with five Pokemon cards
They get uncastable giant creatures out of our hand and into the graveyard, they refill our hand with fresh gas to play, and of course, they trigger Sefris (so long as we discard at least one creature)
Iwasaki signed the contract that stated that Creatures would be the Card Developer and Star Corporation the Wholesaler
Other than that, the sorting pretty much goes the Pokemon types (Grass, Water, Fire, etc) in alphabetical order and then in alphabetical order based on the Pokemon's name within their type
Illustrated by Hiromichi Sugiyama, the artwork gives Volcanion the full treatment it deserves as a Mythical Fire and Water-type Pokemon that has rarely gotten this kind of spotlight in the TCG