Same as the above, except Marth will continue alternating between the two slashes
Forward + A
Another upward slash, but at a much wider arc
Dash + A
Same as the above, but lower and while running.
Down + A
Marth jabs his sword low against the floor, hitting his opponent's feet.
Up + A
Marth Slashes in an arc above him
Smash Forward + A
A large downward slash
Smash Down + A
He slashes in front of him, then behind him.
Smash Up + A
He jabs his sword straight up
A (Lying down)
Marth gets up, then stabs behind him, then in front of him
A (Hanging of Edge)
Marth jumps back up from the ledge while slashing with the momentum.
Smash Forward + A (Holding a weapon item)
A unique ability shared with Roy, Marth will actually open with an attack from his sword before following up with an attack with the item he is holding.
Marth holds his sword and charges up. When B is released, Marth slashes in front of him. It is so named, because it can break a shield when fully charged
Up + B
Dolphin Slash
A rising slash that sends Marth upward a good distance. An opponent hit just when Marth jumps will be sent forward
Down + B
Counter
Marth protects himself with his sword for a short while. If he is attacked in this time, he will block the attack and counter attack.
Forward + B
Dancing Blade
By pressing B three more times, Marth will launch a four hit combo. The attacks can be modified by holding up or down while pressing B, allowing for many different attack combinations
It is worth noting that, when smashing with a melee item (i.e. beam sword), Marth and Roy swing their sword first, followed by an item swing. Against low-percentage enemies, the first strike is a great check and provides excellent positioning.