Chapter 1 Skip (co-op)

https://www.youtube.com/watch?v=vWSyF4S250I

Description of the setup is as follows, with yarny "A" = yellow and yarny "B" = red :

1) go through the first bit of wooden fence as usual

2) once through the fence, unmerge and push the piece of wood to jump over the rock like usual

3) yarny "A" stays on the rock while yarny "B" jumps over the first stick that slides down to the left (the one used for OG log strat)

4) zoop cancel yarny "B" onto the second stick that slides down to the right. Once yarny "B" lands, jump to get a front flip and fling yarny "A" so that "A" flies over the second bit of wood fence to the right. Make sure yarny "B" does not zoop and stays separate from yarny "A" so that there is a yarny on either side of the second wood fence [note: If yarny "A" doesn't make it over the fence, the next front flip needed might not work. As far as we can tell, it's best to fling way over and have to walk left a bit than not make it over]

5) yarny "B" jumps on top of the rock where both of the sticks rest and for some reason you can usually get front flips on this spot. So yarny "B" front flips to the left and flings yarny "A" [note: we use slow-mo to make the timing of the fling a little more forgiving/easy]

6) if step 5 produces a low, speedy trajectory to the left, you can make it to the lighthouse with just the one fling. If the fling from step 5 has the yarnys flying more upward than to the left and they are spinning around, there is a possibility to fling a third time and travel to the left. While slightly more difficult, reaching the lighthouse can sometimes go even quicker this way

Co-op 1) Zoops & Zoop Cancels

Co-op 2) Swings & Super Swings

https://www.youtube.com/watch?v=KRt-jjwVz3I

Co-op 3) Ground Fling Overview w/ some setups

Co-Op Any% NMS Guide made by @ThisGuyAreRyan and @ms_rey

https://www.youtube.com/playlist?list=PLXW4C-J056P0jN5ZXge9SNI_0KuDytdoJ

Glitch/tech Terminology with Examples

Zoop – with autograb turned off hold connecting yarn (triangle/X/Y) and carry (L2/ZL/LT) buttons together. So L2 + triangle for PS, ZL + X for Switch, LT + Y for Xbox. One yarny flies and merges with the other yarny. Two controllers needed.
https://youtu.be/2M4WvPbsSOw
 
Zoop cancel (boost/shift/etc) – when yarny A zoops to yarny B, yarny B zoops which cancels the first zoop. Two controllers needed.
https://youtu.be/qYIOivPuU00
 
"Neo-climbing" - using the game's carry button (L2/ZL/LT) to climb up vertical surfaces. This can be done in solo or co-op and autograb doesn't have to be off.
Co-op : at a wall, both yarnys hold down L2/ZL/LT, keep the analog stick pressed directly up, and keep jumping until you're at the top of whatever vertical surface you're trying to climb. Doesn't seem to work very well on slanted walls.
Solo : at a wall, hold down L2/ZL/LT and alternate between yarny swapping (triangle/X/Y) and jumping.
https://youtu.be/s1UxohDDPuA

Zoop wall jump (ZWJ) – chaining multiple zoop cancels together in a row. Height restricted to the length of yarn between the two yarnys. Two controllers needed.
https://youtu.be/8bWrhaesoPc
This can also be done without a wall and looks kind of like one yarny is being juggled in the air.
https://m.youtube.com/watch?v=MB22VlfEshk
 
Infinite wall jump (IWJ) – PC only trick with keyboard where you hold the direction into a wall, then tap away from the wall and jump at the same time once you come in contact with the wall to essentially jump your way up. Height not restricted though doing this when yarny is not visible can be difficult.
https://www.youtube.com/watch?v=oFhnbSD2E7k
 
Partner swing – while yarny A holds onto a knot, yarny B holds onto yarny A, which can increase the swing radius and also allows for greater swing momentum. Can be done in solo or co-op.
https://youtu.be/HP-5qZfoNd4

"Super swing" - using a partner swing and conserving the extra swing momentum upon release by Yarny B zooping immediately after yarny A releases. Like regular swings, there is a max distance you can achieve with a well executed super swing. You can travel further than regular swings but won't travel as far as a lucky fling.
https://youtu.be/qUgfH-S9uG4

Fling – zoop cancel while a yarny is flipping (front flipping usually seems to give the best results). Yarny A zoops while yarny B is front flipping, as yarny A is flying toward yarny B (usually in a high arc), yarny B zoop cancels yarny A, which then propels yarny A. Yarny B can then zoop to yarny A to conserve the fling momentum. Two controllers needed. 
Using flip on the ground : https://youtu.be/rcVArTg680o
Using flip from a knot : https://youtu.be/fU_HXJLxhIQ
Using a second cancel in air for a "super fling" : https://www.youtube.com/watch?v=ZIO8nhqS7Pc
Canceling a swing fling very late for a "groundpound fling" (needs higher fps) : https://www.youtube.com/watch?v=B4qMGdXdnzQ

Log/branch launch - near the start of chapter 1 there is a log that can be used to propel yourself. With one yarny on top and one yarny below the log, have both yarnys hold the carry button (L2/ZL/LT) and by moving around (or jumping helps sometimes), there can be a violent reaction which sends the yarnys flying. There hasn't been a consistent setup found for this trick yet and it seems to be pretty random but if you get lucky and get shot off to the left, you can sometimes land at the end level trigger with the steps to the lighthouse and essentially skip the whole chapter.
https://youtu.be/1kxnomxLCBA?t=22

Skateboard launch - same as the log skip but instead using the skateboard in chapter two. If lucky with the reaction and shot to the right, you can get closer to the end of the level or even sometimes land in the last room before the end level cutscene.
https://youtu.be/KzEV0AshO5g?t=288
 
Tangle – when the yarn gets stuck on something in the level while attempting to zoop. 
https://youtu.be/lUQkApANdEM
Sometimes you can move the yarnys around so the string frees itself allowing to untangle. Tying a knot on an anchor point usually separates the yarnys but you might still have yarn stuck in the game environment. Worst case scenario, a checkpoint restart will do the trick.
https://youtu.be/eK411nr_JmU

Wall Climbing with Controller (solo)

https://youtu.be/CgEZXU6mcVI

[[[Controls shown below as playstation / xbox / switch]]]

1) Hold and continue holding down the carry button ( L2 / LT / ZL )
2) Hold and continue holding up on the left analog stick (slightly in or away can work, as well)
3) Alternate between the jump button ( X / A / B ) and the switch yarny button ( △ / Y / X )

Where to aim when super launching

Video Explains it.
I love TTS voices dont bother meeee :3
https://www.youtube.com/watch?v=QcFuCb299lQ


Name	Author
Chapter 1 Skip (co-op)	ripWSB 3 years ago
Co-op 1) Zoops & Zoop Cancels	ripWSB 3 years ago
Co-op 2) Swings & Super Swings	ripWSB 3 years ago
Co-op 3) Ground Fling Overview w/ some setups	ripWSB 3 years ago
Co-Op Any% NMS Guide made by @ThisGuyAreRyan and @ms_rey	LouLouCore 4 years ago
Glitch/tech Terminology with Examples	ripWSB 2 years ago
Wall Climbing with Controller (solo)	ripWSB 3 years ago
Where to aim when super launching	Feeelixwhz 1 year ago