Nothing at all, he could have been a slob from anywhere, sitting in a basement and faking crappy Japanese to string along bored and/or gullible Smash fans, he just happened to be from there.
Well, I have even less faith if it's from 4chan. GameFAQs at least had one legitimate text leak from ChaosZero for Brawl, but 4chan has had zero (image leaks are a different story).
But yes, Dixie has been a staple of fake leaks for years and years, because people still believe she's next in line for any and all open Smash spots for whatever reason. Too bad this one's internal logic is inconsistent..."We followed the ballot for Isaac and Snake, the former of whom has 'no future,' but K. Rool? Ha, please, shoehorn in a consolation prize DK Rep instead."