After help for my region.

I'm looking for some help choosing Pokémon for my region. I have 188 Pokémon so far (not including different forms) after a total 250 including legendaries. plz give me your ideas for exsiting Pokémon, and your own ideas, to add to the region. I'm lacking a bit of everything. the region is going to be very peaceful and environmentally friendly. I'm good on regional varients, but if I see a good idea, I will use it. I made sure to start with the basics (starter Pokémon; first Pokémon you encounter/battle; Eevee + eeveelutions; Pichu, Pikachu & Raichu). if you have an original idea for a Pokémon, feel free to give it evolutions. any ideas for original Pokémon that don't make the cut, will be added to a Pokémon fan game in the future, if you allow it (I will ask seperatly).