-This fantastic update was brought to you by Sai-

General:
Added compatibility to the following items: Otto, Toon Link, The Trial Grounds, Mt. DeDeDe Stadium and Soulbound Conflict.

Quality of Life:
Updated sound effects in most moves.
Extra animations and visual effects.
New QPU Aligned aura (There's a trail behind Mario when his SPD is high enough).

Speed mechanic:
Added a Scuttlebug to his kit, which will jump around on its own. If Mario jumps on it, he'll gain SPD depending on the ammount of jumps the Scuttlebug did. After the fifth jump, stomping on the bug will cause a Glitch Zone to appear, which will damage opponents. Mario's SPD will increase while inside the Glitch Zone.
All his moves make his SPD increase by a tiny bit and keep it there in order to avoid losing too much SPD.
Moonwalking and landing Fspecial give some extra SPD to Mario.

Neutral Special:
Charge speed increases with Mario's SPD.

Down Special:
Tapping Dspecial summons a Scuttlebug (holding makes Mario BLJ).

Dash Attack:
It's now jump cancellable.

Up Air:
Easier to hit grounded opponents.

Mario's strongs change their properties when in the QPU Aligned state:

Forward Strong:
Mario's afterimages slap the opponent multiple times.

Up Strong:
The keyhole becomes bigger.

Down Strong:
Mario sends out two afterimages to both sides for extended range.