>>42532727>>42532689Sorry for the delay. The glitch works by cloning 10 of a shiny pokemon and 10 of the pokemon you want to convert into a shiny. You can use the red Gyarados, though make sure to create 11 clones and keep one in a box, because the 10 that are going to be used in the glitch will be useless if everything goes right.
After getting 10 of each, go to an empty box an arrange the pokemon this way: Shiny pokemon, pokemon you want to shinyfy, shiny pokemon. You do that until the box is full.