Double post to compare My numbers with those for every other board with a Jiggs number that disagrees:
Marth has us at 70, I consider him 65, whatever.
ROB has us at 60, for reasons that are beyond me. You are an air character, and ROB's slow aerials leave massive blind spots that Jiggs can take advantage of better than anyone. ROB is one of my favorite matchups with Jiggs, ROB can't really do anything scary besides nair, which Jiggs is fast enough in the air to punish. D-smash gets wrecked by Jiggs's diagonal priority if you can bait it. It's easy to keep fair fresh against him too, though he does live a long time. I have ROB at 40.
Olimar has us at 75, which is to be expected really: Olimar eats bad Jigglypuffs for breakfast, like shootign fish in a barrel. Of course, as has been discussed a great deal, a good Jigglypuff that knocks the matchup will be avoiding all those scary grabs and most the u-smashes, and beating Olimar soundly in the air. Anyone who disagrees with this matchup being 50 or similar might as well be wearing a giant sign that says "I don't know how to play Jigglypuff".
Kirby and Pikachu boards both have us at 60, I have both at 55. Whatever. (Kirby boards are probably right, Pikachu meh.)
ICs consider us 45, which sounds about until they realize that Blizzard shuts down everything we can do and makes us approach in risky, grab-able ways. I stand by my 60.
TL and Zamus have us at 60, I have them at 50. Meh, I just think their numbers are inflated. Zamus specifically is a better matchup once Jiggs learns to never get hit by side-B... she has the mobility, no excuse to get hit by it.
Pit boards have us at 60, I don't even know what to think about that, lol. Ky's a better player than me, one of the best Pits, and I won the majority of the games we've played. Jiggs has none of the qualities Pit likes in his opponents...
Peach has us at 55, again, I think that's inflated. I have not played any Peach players better than me though, so I am unqualified to say too much. Peach players close to my level don't give me problems at all though... I have it at 45, might be 50.
Luigi has us at 65... It's better once Jigglypuff starts being paranoid about up-B, but sitll in his favor. 55.
Zelda has us at 65 to my 60. Meh, whatever.
Shiek has us at 45 to my 40. Meh, whatever.
Ike has us at 60... huh? Ike, who can't hit us with anything but jabs and is gimped incredibly easily, has an advantage against Jiggs? When I played Mr. Doom in several games recently, who I consider a better and smarter player than me, I think I won a majority. (Close games though!)
Lucas has us at 65, totally confusing me. Again, I haven't really played any Lucas players better than me, and Lucas players near my skill level give me no trouble.
Samus has us at 55, which also baffles me. I don't have much trouble with Metal or Joker's excellent Samus.
Sonic boards have us at--oh wait, no one cares, it's the Sonic board.
Yoshi has us at 60, furthering the delusion that Jigglypuff's only purpose in life is to jump into their u-smashes. Bwett's better than me, and we were going dead even. It's 45 for Yoshi.
Ganondorf board has us at 60, I have it at 70. Poor Ganon board, can you blame them? Really, can you?