If Pokémon really did exist, say tomorrow, I would quit University then i'd follow my goal of ...
I wouldn't be one of the tens of thousands who would go out a become 'The Best There Ever Was' or to 'Catch Them All'.
Personally i'd have maybe one or two Pokémon, have them as companions, i.e not in Pokéballs, although i'ld keep their balls with me just in case.
I would then travel around the world, but not to catch them all, as stated above, nor do the gyms, contests, or leauges, but to just explore and help out those who need it.
Also, I would teach to young trainers ect. just to tell them of my stories and how to treat Pokémon propabaly, i.e nicely.
I might even publish my bigger stories (travels) so people around the world can experiance what I see and find, even from there own home.
So, basically to sum it all up:
#1 > Have 1 or 2 Pokémon companions
#2 > Travel the world to explore
#3 > Share my experiances to everyone
#4 > Help those who need it
#5 > Teach to the young as i go along