The only battle chip you can get is Meteors, which do 40 damage each meteor, and I think you get it from somewhere like the GraveYard or something. I have it, but don't really remember how to get it.
Well, actually, it depends on which rock you mean. If you mean the "wiggly rock" at the battle frontier, then that's actually a Sudowoodo, and it attacks you when you water it with a wailmer pail, giving you access to Artisans Cave, filled with Smeargle, a Pokemon that copies the first attack that you use against it. Other rocks are either smashed by rock smash of pushed by strength.
No, you may not as this is an illegal move.
It depends on what part of the process you work on. A game needs artists for concept art. The graphics models need to be drawn by somebody who can use 3d modeling software. Most importantly, games need people who can write code, and lots of it. To get a job writing code, you need to know at least C++, Java, Basic, or all of them.
== == Yes, and other games as well. You can download pretty much whatever is available, Xbox 360 games, Wii games, Ps3 games and other consoles too.