Another note on the Blissey usage: In spl (it is kinda safe to assume that people involved at least slightly know what they are doing) there were a total of 4 Blisseys. Just to put that in relation, there were 81 Snorlax', 45 Zapdos, 31 Raikous. A rank mons were 52 Cloysters, 35 Exeggutors, 33 Tyranitars, 30 Skarmorys, 23 Gengars, 18 Starmies, 18 Nidokings, 14 Miltanks, 13 Vaporeons, 13 Steelix' and 6 Suicunes. So Blissey did not outrun a single A rank mon in usage in that tournament, unlike other B rank mons like Machamp with a usage of 17, Umbreon with a usage of 12, etc. I know tournament play =/= total usage, etc. But i think it's a nice proof of how less relevant Blissey has gotten in GSC OU.