Pikachu
Charizard
Mewtwo
And then someone that's just happy to be there. I can see it being Eevee or Jigglypuff. Eevee got its own game but Jigglypuff is in Smash and appeared frequently in the anime. I think I'll go with
Jigglypuff
It's tempting to linger in this moment, while every possibility still exists. But unless collapsed by an observer, they will never be more than possibilities.