Multishining is the action of shining, canceling your shine with a jump then, as soon as you leave the ground, shining again
Moonwalking is achieved by tilting the control stick backwards while dashing, but without passing through the neutral position. The only easy way to do this is to rotate the stick below the neutral position (as going above results in a jump), but just barely below as to prevent losing some distance from crouching.
Ledge-canceling moves grants players opportunities for more movement options and for extremely fast follow-ups using attacks that do not normally have combo potential.
Text is from ssbwiki