My team is Tirtouga, Beldum, Shelgon, Charizard, and Noibat. It is between Jolteon or Snivy. They both have high attack and speed, and I don't have lightning or grass on my team yet. Based on move sets for the whole teams Pokémon, who's better?
I would recommend Snivy because most of your team has a weakness to rock or ground while Charizard has a weakness to rock (4x) and water (2x) and Snivy can cover those three types plus it has access to some good grass type moves like Giga Drain and Leaf Blade.