No, you are not. I don't know why but so many people here have the misconception that its illegal to dump roms from cartridges that you own, trust me on this one, it is not.
Lets compare dumping a rom image to copying a cd.
A cd you should well know that you are allowed to make personal use backups of. A cd merely contains binary data of a copyrighted work. A cartridge is the same thing, only the binary data happens to be stored in solid state form instead of a compact disc form. Remember, anything that you do with your own property is legal so long as the copyrighted works within do not make it into the hands of others, unless they have a license to own that specific work. A rom image is merely a personal use backup of what YOU own, the law sees it no different than making a cd-r backup of your favorite pc game for example. At least this is the law in the US anyways, your specific country might vary, but I know that this would hold true in most EU countries.
Hence why translating is legal, you are not prohibited from buying an imported game, copying it to your computers hard drive, then using a patch for that game posted on the internet to translate it to english. There is nothing illegal done here at all.
Anything is legal unless theres a law or precedence stating that it is prohibited, so you can't always prove that something is legal in an argument, but you can prove that something is illegal. So, if somebody here reading this still insists that dumping a rom is illegal, please enlighten me on which law or which court court case decided this, because I would realy like to see it.
. I'm now looking for a way to follow the law and maybe still play around with one of the new pokemon games untill it's released here.
