Altaria

Altaria's Mega Evolution gives it good stats and an amazing new ability in Pixilate, but the metagame around it has many answers for it or better options to use. However, poor Defense and HP plague the other two Pixilate users, while Mega Altaria's amazing 110 Defense and 105 Special Defense along with an astounding 7 resistances allow it to survive incredibly powerful moves. These include max Special Attack Mega Charizard Y's Overheat in sun as well as max Attack Mega Kangaskhan and Mega Salamence's Double-Edge. Altaria also has access to moves such as Draco Meteor, Ice Beam, and Fire Blast that Gardevoir and Sylveon do not. Altaria also has an extensive support movepool and an interesting niche ability in Cloud Nine, being the only viable passive weather stop in the Battle Spot Doubles metagame. This ability halts Swift Swim, Chlorophyll, Rain Dish, and Solar Power in their tracks, as well as forcing Mega Charizard Y's Solar Beam to take two turns to use, leaving Mega Charizard Y open for a whole turn. However, Altaria's terrible base 80 Speed leaves it too fast for Trick Room while slightly too slow for standard playstyles, and its loss of its Flying typing leaves it vulnerable to Earthquake and other Ground-type moves.