Hope I'm not too late, sister just reminded me to vote...
For the first match: I pick Celica. I like playing Doubles in Pokemon, and I hate facing Tapu Koko. It is way too strong, especially with Alola Raichu. And like Mr. Freez Shock said, Celica is a serious babe.
For the second match: I pick Incineroar. It has to be one of the best Starter Pokemon. Not as good as Blastoise, Charizard or Venusaur, but it's still in my Top 10.