Eh. I'll try to showcase some other things. sorry about quality. 5 dollar capture card
Basically to get a guaranteed Lemon lock you need to land 2 consecutive Foostools.
The only way to combo into Footstools is Leafshield and Items.
(0:00)
The first showed Leafshield > primary Footstool > Zdrop > secondary Footstool > Lemon Lock (11%)
(0:43, or press 3)
the Second showed Zdrop > Zcatch > primary Footstool > Zdrop > secondary Footstool > Lemon Lock (16%)
You can do a semi-infinite by repeating case 2.
The Lemon Lock gives you enough time to repeat teh combo, but as you can see, the metalblade can poof when it touches the ground, which is 100% RNG. If you're lucky, you can do it 6 times (Metal Blade survives 5 landings, 6*16%=96%), and finish with a megaupper for a 0-death.
If someone could do some statistics and get some number on the chances that Metal Blade disappears, that'd be appreciated. I feel it's 50%
It works at all percents. 999% you can get both Footstools, but Lemons deal too much knockback to Jab Lock. so not ALL percents, but yes any realistic percents
Optimized Lemons bit (skip to, 2:13; or press 9)
I use luigi since he has low traction and is an extreme example
As you can see Jab > Jab > Jab is possible, resulting in a 9% combo
and to get max damage Jab > Jab > Nair, resulting in a 10% combo
What I did was cancel f-tilt into Jab by killing the movement stick with C-stick just before the F-tilt hitbox comes out.
The input looks like this
Whilst holding

:

F-tilt >

cancel f-tilt, Jab >

/(

) F-tilt >

cancel f-tilt, Jab >

/(

) F-tilt >

cancel f-tilt, Jab
I mention

, because you may find it easier to press a shoulder button to F-tilt because thumb is on c-stick.
Don't flick the C-stick, As soon as you are in hitlag, i.e. as soon as Jab connects and you successfully canceled F-tilt into Jab, then return C-stick to neutral
Any questions?