Fixed xD. Actually that's how I see it now.Imho, the regional aces are these:
Kanto: No one
Orange Islands: No one
Johto: No one
Original Series: Charizard
Hoenn: No one
Kanto Battle Frontier: Sceptile
It took on Gary's Magmar, and despite have a type disadvantage and having a Magmar that had covered itself in fire and then slammed into Heracross and then shooting more fire at it, Heracross was able to break free and then break through a Flamethrower and beat Magmar.
One good win doesn't make it an ace. Hawlucha's win against Spritzee was more impressive than that in my opinion.
Anyway, regarding the ace of Alola, my bets are: Pikachu, Decidueye and Incineroar.