Nightmare

Nightmare (also referred to as Nightmare Wizard) is a villain in the Kirby franchise. He has only made a few appearances, most notably as the final boss of Kirby's Adventure and its remake, Kirby: Nightmare in Dream Land. In both games, Nightmare tried to plunge the realm of Dream Land into darkness, but was defeated by the combined forces of King Dedede and Kirby wielding the power of the Star Rod. He is also a major antagonist in Kirby: Right Back at Ya!, in which he is instead named eNeMeE.

Super Smash Bros. series
In Super Smash Bros. series, Nightmare is featured as an Assist Trophy in Super Smash Bros. for Nintendo 3DS / Wii U and Super Smash Bros. Ultimate. In both games, Nightmare takes on his Kirby: Nightmare in Dream Land appearance. When summoned, Nightmare first appears in his Power Orb form before flying to the top of the screen. After a few seconds, he immediately appears and enlarges himself in the background of the stage while cackling and shrouding the stage in darkness. During this time, the entire screen is black, confusing both players and CPU opponents. Several seconds later, the darkness slowly fades away, along with Nightmare.