This is for Hatching Eggs
Volcarona, Fletchinder, Talonflame, and Moltres are the only Pokemon that have this combination. They learn Fly and all have the ability Flame Body. Volcarona, Fletchinder and Talonflame have Flame Body as a natural ability, Moltres has Flame Body as a Hidden Ability.
Only Volcarona can learn Fly and have Flame Body unless you get Moltres with its special ability Flame Body.
[Pokemon DB Flame Body]
Hope this helps :)