Which means by the time we see a Blue Ugin judge foil, a set foil Ugin could be worth $120 $130 and even if a non-foil Blue Ugin were to be worth a mere $10 $20 more, Blue Ugins would probably still command a price range of $130 $150
So Charizard EX decks are packed with cards that let you draw cards (like Pidgeot ex), search for cards (like Supporter Arven or Ultra Ball), or speed up evolution (Rare Candy)
its also worth noting that Clefairy, not Pikachu, was initially intended to be Pokmons series mascot, giving the Fairy-type Pokmon a unique position in Pokmon history
New cards are exciting in their own right, to be sure, but they also often unlock new possibilities for older cards
And while that format makes color-heavy decks easy to run, mono-color decks still have a place, and they aren't weak or boring by any measure