>First of all, you don't need to have fucking 10 pokemon, all you need is a couple in the top used pokes
And yet you guys are complaining about "overcentralization"...
Thanks for doing the challenge, regardless. So it's all Fighting types and Dragons, like I thought. Now check how many things can revenge Terrakion or Keldeo (considered top-tier sweepers by smogon) and see for yourself the difference between them and Kyurem-B.
For Terrakion for example, it would be: Alakazam, Espeon, Scizor, Breloom, scarfed Rotom-W or C, Starmie, Gengar, Scarf Jirachi, Scarf Landorus, Bullet Punch Metagross, Scarf Staraptor, Azumarill, any weather sweeper in their respective weather (Venusaur, Sawsbuck, Victreebel, Lilligant, Stoutland, swift swimmers if they were unbanned...), and really any scarfer with a super effective move...Not to mention all the things that can take his Choice Band CC and KO next turn - any bulky water for example, or any ghost.
tl;dr version - Terrakion has more weaknesses, can OHKO much less, and gets OHKOed by neutral hits after CC drops, while Kyurem-B does not.