realistic depending on situation butterfree beedrill and geodude would probably be best bet maybe a pidgey for pidgeot opness while being very common to encounter and evolves into a nice mount
My series team: Mismagius,Lopunny,Gardevoir(or Alakazam),Milotic(or Gyarados),Altaria and Vulpix(or Rapidash)
Anyway, a very mixed team with elements to fight general