I vote for
THS mix defense sableye-mega even though it doesn't have snarl because I'm sure if we just tell ppl about snarl, theyd pick snarl over shadow ball! With Calm Mind and recover and magic bounce, Sableye-Mega can avoid taunt by both and can burn stall gengar between calm mind reco0ver and burn damage so it can even avoid destiny bond nonsense!
As for thundurus-i, nasty plot is troublesome but that's where I'd rock snarl over shadow ball (and hopefully you ppl who see this and like mega sableye realize the goodness that is snarl) as it lowers spatt 1 stage, is stab, AND hits behind Sub! While it's unlikely a mega sableye can handle thundurus-i 1v1, using this mix defense spread and snarl (and even calm mind while Thundurus-i nasty plots!) can allow mega sableye to AT LEAST stop a thundurus-i sweep, something. A plus 1 spdef mega sableye that snarls thundurus-i can make it drop down to basically neutral spatt in terms of the damage to mega sableye.
I know snarl wasn't nommed, but again I think it is simply a matter of ppl not knowing its greatness and I like mixed with a bold nature because it allows you to STILL hamper physical attackers and counter megaKhan, which many of such team archetypes have like Khan, Chomp, Tflame, Suicune, Gengar, Thundurus!
MegaMan and Lando core can hamper physical attackers too while bulky mons like MKhan and Chomp can still survive a sand driller and end its attempt at sweeping which is why I didn't vote bobo! Again, why mega sableye is great for this core AND potential 3rd pokemon teammates!!!!!!! Btw it seems he meant to have calm natured not bold natured mega sableye haha but again mixed bulk is simply great!
Keep up the great nominations
THS :)