PumpkinCake

Yo, my name's Brunt Crisp. Ask away Party Ponies

Yes, you should probably make his cutie mark, design, personality, family and all the other necessary bio info needed before starting to write. For me personally this helps a lot and can be the difference between a crap 2D story and a deep and well thought out one Good luck btw

I usually write the Apple Family's Accents using "Ah" instead of "I" and shortening words like "won't" into "won'". The thing is is that you have to remember that people will be reading this and you can't make the accents too thick. By all means use "don'" instead of "don't" etc. but try keep accents to the minimum while still putting the tinge of southern into their voices. It needs to be understandable and if you point out from the beginning how strong their accents is, readers will automatically read hear the accent in their head. Unless their accent isn't understandable (which none of the Apple Family's is) then you go all out Hope this helps~

I personally think his hair looks like fire XD Just a suggestion, but you might want to think of creating a character where you know the backstory for his cutie mark and incorporate this backstory in so that it can be used as a base for other stories.. If that makes sense? lol