Aaah yes I see, yeah I got that too.
I looked from bulbapedia, but in fact I looked for italian, and it seems that the namesd stay english for them cause it's in english in their wiki. That's why I was wondering...
Found the german names though, they sound pretty cool even though I have no idea what it refers too, but it sounds pokemony (to me of course xD) (although Charizard is.... GLURAK ? what the hell ?)
I can't even picture what could be italian pokemons though... the idea itself doesn't sound better than english xDDD
http://pokewiki.de/Pok%C3%A9mon-Liste