Today's CotD is Blissey Prime from GS, ok enough as a kinda pseudo-healing tech ala Pokemon Center, but overall just not that useful. Statwise, 130 HP is great (40 more than average for a Stage 1), x2 Weakness to is meh, no Resistance is common, and to Retreat is a tad pricey. Blissful Nurse is of course, the reason to use this; this Poke-Power pretty much mimics the old Pokemon Center Trainer right down to the discarding energy effect for all the Pokemon you remove damage counters from. Sadly, there's no Alakazam to partner with this, otherwise it could be pretty effective still. SP decks don't like it because it's not a SP (obvious) and the fact they have Garchomp C Lv X. Strength is meh at for 60, not that you should be attacking with it anyways. I guess you could build a deck around this somehow, but it's just not super practical...
Modified - 3/10 (Largely another forgettable Prime card)
Limited - 8/10 (Useful here if only to prevent your opponent from taking a prize, and it has decent stats)
Unlimited - 1/10 (No use here because of Pokemon Center of course)