What do you think about Talonflame's chances of having some kind of place or niche in OU this gen, as slim as it may seem right now?
IMO, I think it will have to resort to the older, often considered noobish, all-out-offensive movesets it had in the early XY meta, as they were affected the least by the Gale Wings nerf... and can, in fact, entirely forgo it in favor of Flame Body.
Talonflame @ Sharp Beak / Liechi Berry / Salac Berry / Apicot Berry
Ability: Flame Body
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Brave Bird
- Flare Blitz
- Swords Dance
- Roost / Natural Gift
It's somewhat obvious to say that Talonflame benefited from essentially nothing in this generation shift. It gained no notable moves, can't take advantage of a Z-Crystal for luring moves as all it has is Solar Beam, and Bloom Doom will tickle at best on a physical attacker, and, of course, the nerf on Gale Wings.
This means Swords Dance is most likely the way to go, as after all, Talonflame has an amazing base 128 Speed that means it will often hit first with no need for priority, and it helps that this generation introduced literally one Pokemon that is faster than it... that happens to be doubly weak to its Flying STAB (Pheromosa). The Mega Evolution speed buff didn't mean much to it as well, as the Pokemon that outrun it only after Mega Evolving, with the exception of Mega Alakazam, already had ways to beat Talonflame (Swampert's bulk and rain-boosted moves, Lopunny's Fake Out, Manectric's Intimidate and resistance to Flying, etc.).
The Berries may be as effective as always, with Apicot Berry Natural Gift being unaffected by Grassy Terrain meaning Heatran still fears it. It can also be an emergency check to Tapu Bulu, taking one move and both probably getting KOed by their respective recoil.
Bulk Up sets may have a chance to work, but they either have to risk taking a hit before Roosting or sacrifice bulk to keep a fast Roost, so I think it will be inferior in this gen.