I've heard the Japanese name will change if it evolves.
My part has Grotle, Staravia, Bronzor, Luxio, and Buizel. The sixth slot is currently up in the air. I had a Machop there, but I was thinking about replacing him with either a Cranidos or a Stunky. I'm still not sure which I want. Stunky is a strange combination of poison and dark, which will eventually be what I want my party to have, but Cranidos would help me kill electricity pokemon, which I'm generally weak to. And within 10 minutes of not having Machop, I started missing having a fighting pokemon around to pwn up all the normals I run into.
And Cobra, sprinkle some puncuation marks in there. But I train up all of the pokemon in my party. They are all at the same level, unless I fight a gym battle with only one or two pokemon, at which point I just don't use them until my others catch up. That's just how I play, and it isn't conducive to regularly switching out pokemon from my party.