L-cancelled down-drill to rest: This is an old technique, but since I was learning Jigglypuff, it's something I wanted to know a lot more about.
Video: Jigglypuff Drill Rest
The idea of drill-resting is that as Jigglypuff lands from doing a dair she can "flip" her enemies at certain percents, which leave them in slightly more lag, but more importantly, moves their hitbox into Jigglypuff for a brief rest opportunity following an l-cancel.
In practice, this works best against taller characters, not only because they might seem easier to flip, and their flip brings them further into you, but the taller they are the more likely Jigglypuff is to be able to crouch out of shield-grab danger.
To execute it, you need to short-hop and start a down-air asap. The timing on when you should FF (if at all) varies from character to character, so it's something you should get a feel for. Aim for their horizontal center, especially for wider characters, to score flips more often. Make sure you L-cancel, and then if you see them flip, rest. Keep in mind that sometimes you don't even want to rest immediately, but wait for their flipping body to come to you.
I have been unable to get this to work against Pikachu or Bowser. For everyone else I show the minimum and maximum percents it's guaranteed to work if you do it right (keep in mind that there is a 6% window depending on how "stale moves" your dair is):
46-139% Captain Falcon
49-146% Donkey Kong
45-135% Dr. Mario
44-122% Falco
00-118% Fox
00-107% Game & Watch
47-142% Ganondorf
41-127% Ice Climbers
00-106% Jigglypuff
00-114% Kirby
45-140% Link
45-135% Luigi
45-135% Mario
41-126% Marth
00-125% Mewtwo
48-131% Ness
42-128% Peach
00-102% Pichu
00-126% Roy
47-144% Samus
42-128% Sheik
00-141% Yoshi
40-125% Young Link
42-129% Zelda
So except for Bowser and Pikachu, if your foe is at least between 49% and 102%, then you are able to drill-rest them, assuming you're able to dair immediately around them without getting pwned. If you're a rest-happy Jiggs, I would recommend starting out with uptilts and reverse nairs, then if they get to 40+%, maybe try some of these.
As far as I can tell, crouch-cancelling does not impact your ability or inability to perform this move, nor the percents it will or will not work at.
The characters who get the "flip stun" without actually doing a full 360 degree saumersault are Dr. Mario, Game & Watch, Ice Climbers, Jigglypuff, Kirby, Luigi, Mario, Ness, and Pichu.
For Ice Climbers, Jigglypuff, and Kirby, they get stunned away from where you were attacking them, so you need to land all the hits on one side of them, then DI and land on the other side, in order to rest where they will twitch.
For Game & Watch, Jigglypuff, Kirby, Mewtwo, Pichu, Roy, and Yoshi, you don't necissarily have to flip them in order to rest from the drill. As such, the combo can start working even from 0%. Everyone else is necessary to flip, I believe.
As a general disclaimer before someone points out the obvious, DI can potentially avoid this combo, just like virtually any rest combo. The trick is to know how to get a free kill when they don't know about it, forget it once, mess it up, or the situation simply arises. As per usual, I'm investigating something I think is worthwhile myself, and therefore want to share with others for their enjoyment, enlightenment, or intrigue. Haters go elsewhere.
Edit: In conversation with my friends, I found myself saying that for the best drill-rest practice you should drill the women to see if they flip (Peach, Zelda, Sheik, Samus).
Video: Jigglypuff Drill Rest
The idea of drill-resting is that as Jigglypuff lands from doing a dair she can "flip" her enemies at certain percents, which leave them in slightly more lag, but more importantly, moves their hitbox into Jigglypuff for a brief rest opportunity following an l-cancel.
In practice, this works best against taller characters, not only because they might seem easier to flip, and their flip brings them further into you, but the taller they are the more likely Jigglypuff is to be able to crouch out of shield-grab danger.
To execute it, you need to short-hop and start a down-air asap. The timing on when you should FF (if at all) varies from character to character, so it's something you should get a feel for. Aim for their horizontal center, especially for wider characters, to score flips more often. Make sure you L-cancel, and then if you see them flip, rest. Keep in mind that sometimes you don't even want to rest immediately, but wait for their flipping body to come to you.
I have been unable to get this to work against Pikachu or Bowser. For everyone else I show the minimum and maximum percents it's guaranteed to work if you do it right (keep in mind that there is a 6% window depending on how "stale moves" your dair is):
46-139% Captain Falcon
49-146% Donkey Kong
45-135% Dr. Mario
44-122% Falco
00-118% Fox
00-107% Game & Watch
47-142% Ganondorf
41-127% Ice Climbers
00-106% Jigglypuff
00-114% Kirby
45-140% Link
45-135% Luigi
45-135% Mario
41-126% Marth
00-125% Mewtwo
48-131% Ness
42-128% Peach
00-102% Pichu
00-126% Roy
47-144% Samus
42-128% Sheik
00-141% Yoshi
40-125% Young Link
42-129% Zelda
So except for Bowser and Pikachu, if your foe is at least between 49% and 102%, then you are able to drill-rest them, assuming you're able to dair immediately around them without getting pwned. If you're a rest-happy Jiggs, I would recommend starting out with uptilts and reverse nairs, then if they get to 40+%, maybe try some of these.
As far as I can tell, crouch-cancelling does not impact your ability or inability to perform this move, nor the percents it will or will not work at.
The characters who get the "flip stun" without actually doing a full 360 degree saumersault are Dr. Mario, Game & Watch, Ice Climbers, Jigglypuff, Kirby, Luigi, Mario, Ness, and Pichu.
For Ice Climbers, Jigglypuff, and Kirby, they get stunned away from where you were attacking them, so you need to land all the hits on one side of them, then DI and land on the other side, in order to rest where they will twitch.
For Game & Watch, Jigglypuff, Kirby, Mewtwo, Pichu, Roy, and Yoshi, you don't necissarily have to flip them in order to rest from the drill. As such, the combo can start working even from 0%. Everyone else is necessary to flip, I believe.
As a general disclaimer before someone points out the obvious, DI can potentially avoid this combo, just like virtually any rest combo. The trick is to know how to get a free kill when they don't know about it, forget it once, mess it up, or the situation simply arises. As per usual, I'm investigating something I think is worthwhile myself, and therefore want to share with others for their enjoyment, enlightenment, or intrigue. Haters go elsewhere.
Edit: In conversation with my friends, I found myself saying that for the best drill-rest practice you should drill the women to see if they flip (Peach, Zelda, Sheik, Samus).