By A Mystery Man Writer
A multi shine (or double shine, triple shine, etc.) is the repeated use of Reflector as an attack by either Fox or Falco in Super Smash Bros. Melee. It is performed by jump-cancelling a Reflector and using a second Reflector just after leaving the ground, timed so that Fox or Falco will quickly land and allow the pattern to be repeated. It is a very difficult and technically demanding technique and is often practiced at slower speeds in training mode, though it is easier to perform with Falco as his jump squat animation is 2 frames longer. Performing more than two shines in a row in this way is known as "multi shining".
Aegis - Liquipedia Smash Wiki
Absorbing Vortex, Smashpedia
Falco/Moveset - Liquipedia Smash Wiki
Tournament:Shine 2019 - SmashWiki, the Super Smash Bros. wiki
Tournament:Shine 2017 - SmashWiki, the Super Smash Bros. wiki
Reflector (Fox) - SmashWiki, the Super Smash Bros. wiki
Multi-Shine by Ian
Min Min (SSBU) - SmashWiki, the Super Smash Bros. wiki
Dignitas - Liquipedia Smash Wiki
SSBM - Fox Jumpsquats & Multishine – Hit Box Arcade