If this is so true, then prove it by your play and results.
I'm a big fan of evidence in general, but your request is pretty silly. Brawl tournaments are so infrequent here that even if I get Ness points for Ankoku's list (and I have gotten him points) they will be removed (because of the two month cut off) before there is even another tournament. In fact there isn't even another Brawl tournament in sight and the last one was nearly two months ago, heh.
Also, the particular claim you quoted was about low tier tournaments, and there haven't been any of those yet, since there hasn't been a generally accepted tier list. That being said I do play to win, so having a high tier character in a low tier tournament is not something I will pass up the chance to exploit if there is another Brawl tournament around here.
Also, as the first post says, this isn't based only on tournament results. I could write a lengthy explanation justifying my comment from a theoretical point of view, but I don't think anybody is too interested, and it's in my interests to have an advantage in low tier tournaments anyway.
As I said above, placing Ness and Lucas side by side (and Lucas above Ness) suggests a lack of familiarity with both characters. It would be like placing Mario and Luigi side by side with Mario above Luigi.