I'm setting up a new team and my first team Is a great success thanks to the you lot here. I'd like to include a special lucario and my 6 iv shiny latias or deoxys. Latias is the only battle ready one at the moment with a speed sp attack ev spread calm mind, d pulse, roost and physhock.
Special Lucario is only good in its Mega form, as Adaptability powers up Aura Sphere and Flash Cannon to incredible levels:
-Dark Pulse/Shadow Ball/Vacuum Wave
EVs: 4 HP/252 SAtk/252 Spe
Ability: Inner Focus/Steadfast
-Infernape w/Life Orb
Ability: Iron Fist is preferred, but may not be easy to get
EVs: 180 Attack, 76 Sp.Attack, 252 Speed
Moves: Overheat/Fire Blast, Close Combat, Thunder Punch, Hidden Power Ice/Mach Punch
-Infernape w/Choice Band or Life Orb
Ability: Iron Fist/Blaze
EVs: 252 Attack, 252 Speed, 4 HP
Moves: Flare Blitz, Close Combat, Thunder Punch, U-Turn/Mach Punch
And maybe throw something anti-Fairy onto the team? Was there anything else you wanted to use?
Just saying, but a special-based Mega Lucario is not really worth it. Close Combat has a whopping 240 base power because of Adaptability. You don't want to waste that, so I recommend a mixed set.
Specially-based Mega Lucario is viable in its own right. Both physically-based Lucario and specially-based Lucario have different checks and counters, so this gives Lucario a degree of unpredictability.
I had the thought of maybe using a typlosion as a anti trevenant using incinerate and extrasensory
Not worth it. Incinerate is still weak. You're still better off using Knock Off with another Pokemon to hit Trevenant super effectively and get rid of its Berry. While the move is weak as well, it gets stronger if the opponent has an item. A lot of Pokemon learn Knock Off, thanks to the Black 2/White 2 move tutor.
Infiltrator users like Noivern also bypass Trevenant's Substitutes, if it uses the move. Sound move users like Exploud, Mega Gardevoir and Sylveon do that as well.