It provides the necessary breathing room for blue decks to take control of the game (or the skies) and is something Im happy to play multiple copies of
Kids who just want to buy the pretty card of their favorite Pokmon are unable to buy product in stores, and are wildly priced out of buying them as a single
2005 Play Promo Holo Umbreon The 2005 Play Promo Holo Umbreon card was only awarded to members of the Pokmon Player's Club, and they'd need to earn 70,000 EXP points (through various activities and competitions) to get their hands on a copy
Its the best color at using the graveyard both at bringing creatures back, and as a resource
Oko comes down on turn three (often sooner, since green is the color of mana ramp), and if you don't have some way to dish out 6 damage right away, there's not much you can do to catch up
Some are intended to be played in a unique format or to modify traditional games rules while others were rewards for doing well in tournaments or for participating in events