>>19021483im assuming curse gets passed like everything else
in that situation the best solution is to either pass to something capable of killing trevenant, have heavy hazards or just start over and switch manually
theres actually less danger to manual switching than perceived if the opponent hasn't started boosting as well
scizor actually does an extreme amount of damage with boosted pursuit if you have such a moveset
mega mawile also does damage with any move but i'm not sure how many bp teams use that pokemon