Decagrab
The Decagrab is an advanced technique in Super Smash Bros. Melee. This techniques is exclusive to characters with a tether grab, namely Samus, Link and Young Link, that allows them to greatly extend their grab range.
Overview
All tether grabs can be performed while airborne with a standard hitbox, known colloquially as a Zair attack. To perform a decagrab, the landing lag of a Zair needs to be canceled, followed immediately by a a dash attack while holding any grab input (Z, R + A, L + A). If done correctly, the dash attack will be canceled into a grab after the tether despawns with most of the momentum being maintained, significantly extending how far the tether grab reaches.
There are several ways to cancel landing lag, such as slipping off of an edge or being interrupted by an item. For Link and Young Link, the Boomerang is commonly used to to cancel landing lag, though it requires precise timing and some situational awareness.