Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Quite simple. Why are you attempting to answer 4 different questions? Suggests you want more than one Poke. In addition, none of those questions were for the tier Carvanha is in.
you don't have a regular DS or DSi?
I'll see what I can do about transferring it, you should have mentioned this before and not just the previous post.