I'd hopefully become an Oshawott, that way I could have some pretty cool evolutions, some nice damaging moves and I'd be able to travel fast around the world.
I'd set out on a massive journey across the world, trying to find the top specialists(relatively) within the fields of engineering, metallurgy and chesmitry, and recruit a young, impressionable psychic pokemon. Eventually, after I'd have gathered a tip top team of scientist we would create a base in some plains near the water. We would then gather a large population of rock and steel type pokemon and create a town close to the base.
The rock and steel pokemon would gather up resources which we would use to construct a huge spaceship, slowly sending up parts of it to space. The psychic pokemon would be trained to stay loyal and have their psychic abilities honed.
After the space ship would be completed the psychic pokemon would maintain the hyperdrive and make calculations. Now that the ship is completed I would be able to explore the galaxy and possibly beyond, of course I'd take with me all friends who would want it.Also I'd court,marry and then fuck a Serperior(F) and if possible have kids with her. If the spaceship is succesfull they're all coming along on my space adventures