Nightmare Wizard turns out the lights in Super Smash Bros.

Affects the computers as well

Here’s a new Smash assist trophy, Nightmare Wizard. Let’s let Sakurai explain.

Nightmare Wizard appears as an Assist Trophy! He will engulf the stage in darkness, and fighters will need to brawl blindly for a while. Look out for the effect before it goes dark, and play it to your advantage. Blinding and reversal effects even make the computer players mess up.”

Steven Hansen