Celebi, huh? I've seen a rise of it in the last XY Smogon Tours
though it's another stallmon weak to tauntgar, argh I hate that thing and I must say it really is good.
This is not bw, where Celebi was top OU, as such you'll never find hp bug keldeo, which means that Celebi is a good answer to it, lan-incarnate also rarely has u-turn atm, though sludge wave and knock off are problematic, celebi can also cover thundurus with some pdef evs, being a check to the common "genie core" and keldeo is a big plus for a pokemon in the actual metagame, the set I use is psychic recover, baton pass, earth power with 108 speed evs, which allows you to surpass adamant diggersby, adamant dragonite, adamant gyarados and jolly breloom/bisharp (you can never be too much sure against that thing) while not having a grass stab might seem bad psychic+ground is still an acceptable coverage, and as stated by
Bizdis Baton Pass is a must.
Speaking of the "double bunny" team and solutions about it... (don't hurt me please) did someone thought about Air Baloon Diancie?
While air baloon might seem gimmicky as a choice (as such also unexpected) it allows you to completely stop leadchomp, while also setting up stealth rocks, can check in a pinch diggersby if it took some damage (moonblast from the OU Tank set 2hkos) stops latios, stops pinsir, even with earthquake if someone wants to destroy doublade too, it is also not trapped by magnezone or magneton, or heck, even dugtrio if Air Baloon is in play.