I still have trouble understanding how Nintendo could have solid results for the ballot yet. I mean I know it's possible, but it seems like the results would be absolutely useless if more votes are coming in as the results are being tallied.
I think it's just a matter of them knowing a character is popular, so they add them as a costume. This could help explain why K. Rool and Chrom were announced together. Chrom is a very popular character but I don't think he is/is going to be anywhere near the top of the Ballot. It also, probably, applies to Lloyd as well seeing as how he was a very popular character for the Namco rep pre-release.
Maybe, Sakurai/Nintendo is putting in popular characters as costumes for the sake of them being popular characters. I don't see Isaac being a costume because, although he IS extremely popular, he isn't a big hit name with people who don't know of Golden Sun. You COULD say this applies to K. Rool and Lloyd as well but, seeing as how they are from two very well known series', I don't think it applies.
So, what I'm trying to say is perhaps the results aren't tallied yet, which means having a popular character as a costume isn't the EndGame for the character. I highly doubt the costumes were made off of the ballot results. I mean, come on, do you really think Lloyd and Chrom were anywhere near the same popularity as K. Rool? I sure don't.