>>26632972Latios is actually a counter. Can't by any means be KOd on the switchin and does this in return:
252 SpA Choice Specs Latios Draco Meteor vs. 0 HP / 4 SpD Mega Charizard Y: 282-333 (94.9 - 112.1%) -- 68.8% chance to OHKO
A check would be something like Scarf Lando-T/Excadrill with Rock coverage. Can't switch in by any means but definitely outspeeds and OHKOs if given a free turn to get in.
Also, I'm not really sure about listing M-Altaria as a zero drawbacks hard stop to Zard Y. It needs to be Mega evolved to get the SpD buff necessary to avoid the 2HKO from Drought boosted Fire Blast, and it also needs to be Mega evolved to avoid getting wrecked on the switch by some madman running Dragon Pulse. Also the Dragon Dance variant of M-Altaria simply isn't bulky enough to consistently take Sun boosted Fire Blasts, it just hits too hard even resisted.
252 SpA Mega Charizard Y Fire Blast vs. 0 HP / 0 SpD Mega Altaria in Sun: 150-177 (51.5 - 60.8%) -- guaranteed 2HKO
Keeping in mind that Pixilate Returns are also resisted by Zard Y so you have to try to get a DD off whilst taking these hard hitting Fire Blasts to even begin to threaten it. No one runs Dragon coverage on M-Alt and Zard is obviously immune to the ever popular Earthquake coverage.
252 Atk Pixilate Mega Altaria Return vs. 0 HP / 0 Def Mega Charizard Y: 118-140 (39.7 - 47.1%) -- guaranteed 3HKO
(Jolly because you'd be retarded to not want to outspeed the base 135 speed Megas after a DD on a purely offensive Mega Altaria)