User blog comment:Matt Hadick/Super Smash Bros. for Wii U and 3DS Tips and Tricks/@comment-25161957-20150101075043

Mr Game & Watch's down tilt has the same wind effect as his up aerial. Using this on a recovering opponent will push them up. This move denies ledge grabbing and instead pushes them back to the stage. Why is this useful? Because if they use their recovery move at that moment, they will be wide open for a smash attack.

Little Mac's One hit KO Punch is much more easier to land on an opponent that is recovering over the ledge. Punish them.

Character's with tethers (Link, Samus, Zero Suit Samus, etc) are useful approach attacks. Just remember that using it too close to the ground will cancel the attack.