That seems like a well-balanced team! I'm also going to choose Mudkip as my starter, which'll eventually lead to Swampert, hopefully; can't wait to give its mega form a shot, as it looks very promising!
Since you're going to be having both electric and fire Pokémon on your team, your party would likely wind up to be a little vulnerable to ground-type hits, which, I believe, were common in Ruby, Sapphire, and Emerald (not sure if it's going to be same in Omega Ruby and Alpha Sapphire, but since they like keeping remakes resembling to their originals as closely as possibly, it likely will).
Even though your party is indeed a little open to ground attacks, you still have other Pokémon to endure those strikes, namely Swellow and Swampert. If you'd still like to replace one of them to be more careful and whatnot, I'd recommend considering some Pokémon such as Absol or Dusknoir. Former is better as an attacker, and latter is utilized more for its bulk. Both are great in their own right!
I wish you good luck! Haha.
Hey! Thank you for your assistance! It has helped me. :3 However, I got another question. I'm going to keep the team I planned, but there's one more thing I'm trying to decide...
Should I go for Manectric or Magnezone? I'm unsure which one would help more. What do you think?