I'm a really big fan of Landorus-T in Sun. One of the biggest downsides to the Defensive Pivot Landorus-T, which is its best set imo, is its vulnerability to Water-type moves, commonly a Scald from Tentacruel which keeps it from even beating a Pokemon weak to its STAB. Sun fixes this problem well and in return Landorus-T can check strong dragons like Dragonite, Salamence, etc. which Sun appreciates. http://pastebin.com/RuUDBmQV is the sun team I've had success with utilizing Landorus-T if anyone wants to try out this mon' in sun, I recommend it. The Balloon Volca gives a the team a Special Lando check, btw.