I like Lucario. I don't really think that it was overrated at all. Good movepool and a very good Pokemon for fighting. Also the movie was really popular(I liked it). Sure Gamefreak did put it in almost everything, but one can hardly blame them. That's like if you own a grocery store and you're most popular item is Coca-Cola. It would make sense to put it in several different areas around the store and to put up advertisements saying where it is in the store because it sells so well. That's pretty much what they did with Lucario.