Really starting to see a lot of Celebi coming out to play now. Without Tornadus-T around, it's an amazing anti-rain tool. Thundurus-T is about the only common rain threat that can take it on, but falls to a Nasty Plot boosted HP Ice. It needs to outspeed and kill a weakened Celebi in order to remove it as a threat.
Speaking of Celebi's Nasty Plot set, it's a great partner for Terrakion, who's still just as strong as ever. +2 HP Fire OHKOs Scizor in the rain, and a +2 Earth Power OHKOs Scizor after Stealth Rock damage. We all know how well Celebi takes on Breloom too. I'd consider Celebi to be the biggest winner from this ban.