*cracks knuckles*
First Jigglypuff. Jigglypuff has little chance against Yoshi. Jigglypuff is superior in the Air, but Yoshi actually has a better air game than her. All of Yoshi Air's are better in range or priority, or at least Equal. I won't even discuss her ground game. Being that Jigglypuff is Floaty as hell, she's a slow moving target that's easy to his, which can easily set up combos or kills. Yoshi's DJ Armour makes Jigglypuff harder to juggle him, which locks down one of her few combo potential and kill moves she haves. Finally Rollout can be easily countered by a well timed Pivot Grab which shut's down another Killmove. the only thing she's got left is a well place Rest, which could easily get her killed if missed. I say this is around 7:3 or 8:2 Yoshi. It's clearly in Yoshi's Advantage.
Poor Jiggz. Her aerial game was so nerfed in priority that Yoshi should have no problem harassing her with bairs, uairs, and nairs. Even her bair, which is by far her best aerial, is nerfed in usefulness because Yoshi can't be shield poked.
Nothing to fear from the stubby-legged kicks on the ground, though fsmash has pretty surprising range. It's not like Jiggz will be spending time there.
One small note: rollout can be sort of hard to handle if Yoshi doesn't react in time. DON'T THROW AN EGG. You'll just get punished for it. The best thing to do is attempt to time it right with an ftilt or grab (note that a pivot grab will take time to set up, and an ftilt will only cancel the rollout, not go through it, so follow up with a jab). Egg roll is usually an option as well, but beware its windup lag... if you didn't react in time, you'll eat a big hit. This cancels out rollout as well, so follow with jabs or tilts.
A note on Jiggz' floatiness: Eggs while she's recovering will be pretty useless, but given her slow rate of approach, they're great at the beginning of the match... though you should beware an instant rollout. Also, her light weight all but negates Yoshi's problems killing, so there's a disadvantage of each character canceled out by each other.
You may be exaggerating a bit on her kill moves, seeing as she still has fsmash and the WOP (though Yoshi could always jump out of it). Pound is also an option once Yoshi is at a higher percentage.
A final thing: Avoid shielding too much, more so in this match than in most others. Pound eats shields alive, and Jiggz can usually stay airborne long enough to poke-poke-poke at it even if she can't shieldstab.
If Jiggz could force Yoshi to go on the defensive, she would have this matchup made. However, she lacks the skills to capitalize on Yoshi's weaknesses, and that's why he has an advantage. I hesitate to make it an 8:2 but 7:3 sounds very reasonable.
LoL, I can't believe I wrote all that about Jigglypuff of all characters
Secondly Lucario. Lucario has got to be one of Yoshi's hardest, or not, THE Hardest character to fight. Lucario's Air game beats out Yoshi's airgame in almost every direction, causing a huge problem. When Lucario is on the ground, His tilts and Smashes practically set up a wall in which is hard to pierce. Top that off with a nasty Shield Grab, SideB combos, and the Aura Sphere, which can actually pierce Yoshi's Egg Roll if his % is over 90, and you got one difficult to approach character. The only good thing is that if you manage to get him over the edge, then he's pretty easy to gimp. I say 7:3 Lucario.
Not much about this one I can say, because I'm unfortunately lacking in the Lucario knowledge department (hint: I secretly hate that guy). But I think he deserves the advantage just because of one reason alone, and that's Yoshi's problems killing. Inability to KO + damage multipliers = bad matchup. Any other input on this one? I'd like to get another knowledgable opinion on the ratio, because I'm lost.
Finally DK, since were already talking about him. Just like the other Big Characters, Yoshi's multihit attacks and Egg's tear him up. Yoshi Air Game beat's DK's badly, though they can still hurt if your not careful (Especially the Bair). On the Ground however is a different story. DK's Reach is **** scary, and pretty quick also. It's the #1 thing to look out for. Getting DK over the edge (Which you should easily with Chaingrabs
), He's actually a pretty hard character to gimp. You can easily peg him with Egg's, but his UpB makes it very hard to spike. You can easily kill him though with a Uair if your Under him, so that's a plus. Speaking of Uair, DK seems to be the easiest character to combo with Yoshi. While DK Does have 3 Spikes, they're all easy to see coming and can be easily avoided. The last thing though is the Dreaded Headbutt + Giant Punch Combo.
While an Aggressive DK Player is quite easy to take care of. A Defencive DK is generally more bothersome. I'm going to say 5:5, or 4:6 Yoshi
Like you said, multihits (dair and bair ftw) destroy DK worse than they do Dedede. DK may as well stay out of the air in this matchup, as his only viable move is his bair and he will rarely be facing away from you.
Spamming may be a bit difficult, as I'm fairly sure he cancels out eggs with f-tilt. I've noticed, however, that it's pretty hard to cancel out on a regular basis, so you'll get a few hits in. He doesn't approach fast enough to stop the spam anyway, so feel free to start with a small spam until he gets close.
Mmac got it completely right on the ground game... it's got fantastic range. Ftilt and utilt can stop Yoshi's bair and dair approaches a lot of the time. The best thing to do is let him come to you, then try a pivot grab into cg or a few tilts of your own. A lot of his smashes are pretty laggy, so do your best to punish them with aerials.
DK's recovery is actually not too hard to punish imo... eggs are fun, and dair will beat his uair. Unfortunately, uairs leave Yoshi susceptible to his worst enemy, the footstool. Use with caution. But yeah, gimping usually won't occur. At least Yoshi can tack on a bit more damage.
Overall, this will be a pretty long fight. Both characters will last forever, and each have entirely different styles that can be hard to read. However, each character has enough going for them that I think it should be considered neutral.
Also Wario should be changed to 7:3, maybe even worse
Why exactly? Grab release into usmash is fun, but I don't think it really has a big enough factor on the gameplay to swing it into Yoshi's favor.
Like always, any comments are appreciated.
