{REMEMBER TO READ THE WHOLE INSTRUCTIONS TO RECREATE THIS GLITCH.} Create a new scratch project. Use any costume as 1 sprite and a super small costume as the other sprite. By small I mean SUPER SMALL, like zooming in 200 times and resizing a big circle into 1 pixel of your 200-zoomed in camera. Set the size of the super small sprite to a BIG number (like 100000000000000000000000000) and it will copy the other sprite. IMPORTANT: This is a ONE TIME USE. After updating the bigger sprite, the glitch collapses and you need to make a new project.
No one I found it myself, unless it has already been found. You would need to reload after exiting because its a weird glitch (inserts whirl effect).