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.