Talonflame is superior good in competitive scene; thanks to its ability, it's always able to strike first when using flying-type attacks, giving it an upper-hand. Since we're talking about in-game here, however, I wouldn't recommend you to worry about those kind of things; Talonflame isn't very necessary. It'd be best if you had went along with anything you wish!
For your six team slot, one Pokémon I would suggest looking into is Pidgeot. It's getting a mega-evolution form in ORAS, and carrying it on your party will give you chance of having it tested and whatnot. Judging by its stats, Mega-Pidgeot focuses more on special-based attacks, which it doesn't have much of, sorry to say, but those it does have access to--for example, Ominous Wind, Air Slash, and Heat Wave--are quite decent.
pidgeot gets hurricane too, that's its main selling point :]
Alrighty, thanks for the input.
I'll look into getting a pidgey ready for my playthrough.