I'm going to deviate from the standard torchic set and try something unexpected.
Overheat-STAB, standard move, as a fire type, torchic will be switching a lot anyway.
Hidden power(grass)-There is no move that can replace this for torchic, mastering Hidden power is mastering little cup. Covers all weaknesses
Mud slap-Be a jerk and lower some accuracy.
Physical: I'm gonna try something different from what others said...
endure-you know where this is going
Reversal-It's physical... do the math.
Flamethrower/Hidden power(grass)/Agility-Just in case something happens on the way. Agility to sweep things if you're not worried about ghosts.
Also Trachy, I'm going to answer the other movesets before you choose BA. I'll do it this afternoon.