10 chars .The Shine Falco’s Down B move, aka the reflector. It’s the fastest move in the game tied with Jigglypuff's Rest; it’s exactly 1 frame fast.
Newbies always use the shine for just reflecting. But, the main use of it is as a get off me move since its very fast and close ranged. It’s also used to do incredible combos that leave the opponent with not much to do. In, shine combos, the opponent should be in the state where they cannot attack and their only method of dodging is through the DI. DI means Directional Influence. It’s when you move in a certain direction while being attacked; you use it so that you can get out of a combo or whatever. You can also DI during attacks to space yourself.
. The shine makes you invincible on the 1st frame of the move
. You can't cancel it in the first 3 frames, nor can it reflect any projectile then
. The shine's hitlag is 3 frame for Fox and 4 frames for Falco
. Turning around in the shine takes 3 frames
. Foxs shine's hitbox is a lot bigger than Falco's (incidentally that's why Falco can hit shielding opponents easier)
(thank you Doraki for the info)