Ah yay! I get to fantasize about having Pokemon in real life for a bit :3
There's so many I like...so many choices...
Arcanine, because I LOVE ARCANINE!!!! It would be amazing to have Tiger/Dog/Lion (I believe that is called a Shi-something, I'm not a big expert in Chinese myths/legends) I could love it, use it as transportation, it could protect me ahh if I could have an Arcanine in real life :3
Poliwrath, because POLI IS AWESOME!!!! Having a Poliwrath like Red's would be freaking awesome. It would look out for me, and save me from drowning multiple times xD
Gengar, because hanging out with a Ghost that likes to scare the $#!+ out of people would be fun.
Crobat, because I stay up all night, so chilling out with a giant 6 ft bat at night would be badass, we could go flying around in the middle of the night...
Having a Gyarados would be cool, but I don't think my mom would let me keep a giant sea serpent...