I can see Fox > Jiggly. Having played this matchup too many times, I know the matchup fairly well (and actually like the matchup... as a puff player). Although this is a slight overexaggeration, one good hit on fox that leads to a combo generally ends in death. Fox is one of the easier characters to combo, so once that hit is made, it can be assumed that Fox is dead if puff combos properly. Though what made this matchup >> in the past is that we had agreed that Puff has a hard time even getting into Fox, meaning that although one hit results in death, getting that one hit is nearly impossible.
Having played this matchup alot two months ago, I think the "nearly impossible to hit Fox" was a major overexaggeration. Puff can hit Fox, though it is harder than in many other matchups.
I don't know... I'd say it's borderline between > and >>, but I'd agree to >.
As for Puff vs Luigi... well... I haven't played many Luigis, so I don't have much experience in this matchup. Though one thing I noticed while playing Luigi is that if you get hit by dair or uair, you're dead (easy combo to up-B/down-B). Puff doesn't have many combos on Luigi, meaning that unlike most other characters (where getting a good hit results in high damage or death), you have to hit Luigi many times before you can try to kill him (I guess kind-of like brawl for puff...). I don't know who's approach is better between the two in this matchup, so I can't give a matchup value.
Hurray for actually re-discussing matchups again.