Dolphin Slash

The Dolphin Slash is Marth's Up Special Move. Marth flies quickly upwards, blade extended vertically. Provides decent vertical recovery, but very little horizontal recovery.

A "Reverse Dolphin Slash" can be performed by starting the attack and quickly moving the joystick backwards. This will cause Marth to turn around just before jumping upwards, and if it hits an enemy close to him as he starts the move, it provides much higher damage and knockback due to the hitbox and sweetspot layout of his sword.

In Brawl, the regular Dolphin Slash appears to be at least as powerful as Melee's Reverse Dolphin Slash. Marth can be seen jump-cancelling a shield into it for potential kills.

This move in Brawl is much better than it was in Melee. It's no longer the highest up + b, but it goes more horizontal, and it's vertical recovery is still great. Its speed is also as fast as in Melee.

Dolphin Slash's damage and knockback is strongest in it's first few frames of attack. The longer the attack is out, the weaker it gets. It's best used point blank if it's meant to be used as an attack since the later frames of the attack is weaker than the beginning frames.

What makes this move really shine are the invincibility frames starting on frame 1 to 5, allowing Marth to escape chain grabs and multi hit attacks. The move hits the opponent on frame 5, same as it was in Melee. This makes Dolphin Slash Marth's fastest move.