*Sigh* all the ideas are taken away.
Anyways, I can only think of an idea or two in top of my head.
So....
1. Monos type run. Choosing only two typing mons (or one typing which will become two types after evolution) while travelling throughout the reborn region.
And,
2. Gym leader type run. Using the mons which were only used by the gym leaders in Pokemon anime.