>>22039900Life Orb Greninja wrecks it with Hydro Pump
Slowbro and Mega Slowbro whittle it down
Wrecked by Diancie
Can WoW Mega Metagross but then it has to sacrifice Taunt/Sub. Losing Taunt means Heatran will come in and Roar you away, losing Sub makes you vulnerable to status.
Scared out by Lando-T
Vulnerable to other Talonflames
Wrecked by Mega Manectric
Just about all variants of Azumarill wreck it
and many more.
Meanwhile, here are the Pokemon in OU that deal with Ho-oh
Scarf Rock types--risks burn
Lando-T--risks burn
Mega Diancie--risks burn if it comes in on Sacred Fire
Ho-oh brings more to the table than Talonflame, unless you just want a priority killer.