Editing Yo-yo glitch

[[File:Yoyo glich hitbox.png|thumb|Ness taunting alongside the disconnected yo-yo hitbox, seen in red.]]

The '''yo-yo glitch''' refers to a glitch in ''[[Super Smash Bros. Melee]]'' done using {{SSBM|Ness}}'s {{mvsub|Ness|SSBM|Up smash|alt=yo-yo}}.  It can be used to attack or grab with near limitless range or attach certain single-[[hitbox]] attacks to Ness's body. The discovery of the glitch was a collaborative effort between {{Sm|VilNess}}, {{Sm|LonelyNess}}, and {{Sm|Dan Smith}}, and was spurred on by an innocuous video of an unknown Japanese player accidentally dropping a yo-yo hitbox.

The glitch can be performed in all versions of ''Melee''.

Ness's [[up smash]] consists of 3 states each with its own hitbox: outreaching, spinning, and swinging. The yo-yo glitch drops the last [[hitbox]] of the up smash onto the ground and leaves it there until Ness gets [[KO]]'d or uses a non-[[projectile]] attack. Opponents can get hit by a dropped yo-yo hitbox or a jacket exactly once. Additionally, if an opponent does get hit by either, then the very next set of non-projectile hitboxes Ness uses also cannot hit that opponent (first hit of a multi-hit attack, such as forward aerial, will whiff that opponent, but the following hits can still connect).

==How To Perform==

This glitch works with down smash accordingly but requires that said down smash attack be canceled in its ending frames by an attack or effect (such as a Mushroom).

===Jackets===

After using the yo-yo glitch, certain other attacks can be used to replace the yo-yo hitbox with the hitbox of the attack used. The rules of the regular yo-yo glitch still apply when using a jacket.

Hitting something with the yo-yo creates a special delayed hitbox refresh event. The purpose of the hitbox refresh is to allow a charged smash attack to hit a single target multiple times, while the yo-yo is spinning on ground. However, the refresh event is missing an important detail that normal hitbox creation events always have: it doesn't setup Ness to have his hitboxes removed when his state changes. Thus, the refreshed yo-yo hitbox can stay active after the smash attack has already ended.<ref>https://smashboards.com/threads/the-yo-yo-glitch-cracked-update-faq-now-in-first-post.48717/page-35#post-22600153</ref>

===Down smash yo-yo glitch===

It is also possible to do the yo-yo glitch with down smash. The move must connect with either the extension hitbox, or the charging hitbox. After this, it must be interrupted during a small window where the yo-yo has a hitbox during retraction. The window varies based on charge time, from 1 frame with no charge, increasing up to 12 frames for every frame spend charging after the hitbox connects. Charging for 12 or more frames will not allow the retraction hitbox to appear at all, and therefore not give any possibility of activating the glitch.

yygdeadlinesmash.gif|Not only can one grab the enemy, but smash attacks work too.

yygdeadlinepkt2.gif|Deadline even works with PK Thunder 2, the attack that occurs when Ness hits himself with PK Thunder.

yygmofo.gif|The glitch is viable for tournament use: here, {{Sm|Mofo}} performs the glitch and grabs {{Sm|Hax}} ({{SSBM|Captain Falcon}}) from long range.