If you don't have Sun Abusers you don't have a Sun team, just like having a Tyranitar doesn't automatically make your team a Sand Team unless you have Excadrill.
Also
kantotrainer90, never run a -Defense nature on Mega Diancie since Banded Talonflame now has a stupidly high chance to 2HKO, SD does 72%
minimum with +2 Brave Bird, and Banded Azumarill's Aqua Jet becomes a guaranteed OHKO.
252+ Atk Choice Band Talonflame Brave Bird vs. 0 HP / 0 Def Mega Diancie: 108-128 (44.8 - 53.1%) -- 28.9% chance to 2HKO
252+ Atk Choice Band Talonflame Brave Bird vs. 0 HP / 0- Def Mega Diancie: 120-142 (49.7 - 58.9%) -- 99.6% chance to 2HKO
+2 252 Atk Sharp Beak Talonflame Brave Bird vs. 0 HP / 0 Def Mega Diancie: 157-186 (65.1 - 77.1%) -- guaranteed 2HKO
+2 252 Atk Sharp Beak Talonflame Brave Bird vs. 0 HP / 0- Def Mega Diancie: 175-207 (72.6 - 85.8%) -- guaranteed 2HKO
252+ Atk Choice Band Huge Power Azumarill Aqua Jet vs. 0 HP / 0 Def Mega Diancie: 218-260 (90.4 - 107.8%) -- 43.8% chance to OHKO
252+ Atk Choice Band Huge Power Azumarill Aqua Jet vs. 0 HP / 0- Def Mega Diancie: 246-290 (102 - 120.3%) -- guaranteed OHKO