So I last beat Gardenia and I now have a full team of 6, i did lose two pokemon before though and currently my team consists of a Prinplup, Bibarel, Shellos, Zubat, Hoothoot and a male Burmy.

My team probably isn't the best since I have like 3 water types and 2 flying types, one which isn't a flying type but will evolve into a flying type if it survives.

Is there anyway to make my team better without changing pokemon assume I don't lose any of the pokemon I currently have.