No, Gabite's final evolution (Garchomp) cannot fly. However it can learn the following HM's:
Samurott
Togepi's evolved form Togetic and it's evolved form Togekiss can both learn fly because they are part flying.
No, Steelix is the evolved and final form of Onix
No, Emboar is Tepig's final evolution.
machamp is the final evolved form, it does not evolve
sorry it cant evolve
beatifly is the final evolved form, it doesn't evolve
I don't think so but you can check bulbapedia
No,but evolved form,Lucario,learns it at level 19
If your Pokemon evolves later it could learn more attacks in its pre-evolved form that maybe could not learn if evolved (particularly true with Pokemon who evolve from stones) or it could skip some attacks that should learn in its evolved form. In this case, it is not important, because butterfree will learn Confusion at level 12.
Nope and it's evolved form Ferrothorn can't either
It's the same reason that no letters in the English alphabet have a final form: it's just how the writing system evolved.