Here's the team members of Nightmare's Darkness Alliance :

Leader : Nightmare (Soul Calibur)

Co-Leader : Faust

Members of the team (Generals) :

The generals : Aril, Odium, Speed O Sound Sonic (One Punch Man), Marshall D Teach/Blackbeard (One Piece), Azula and Orsai (Avatar), The Deadly Six (Sonic Lost World), David Jehoahaz Abraham (MAGI), Gruntilda and her sisters alongside Klungo (Banjo-Tooie) and Porky (Earthbound).

Lord of the rings: Sauron

Digimon Adventure/Pokemon : Giovanni, Silver (Pokémon), Shadow Mewtwo, Team Rocket (Jessie, James, Meowth, Cassidy and Butch included), Harley (Pokémon), Team Aqua (Archie and Shelly included), Team Magma (Maxie and Brodie included), Team Galactic (Cyrus, Saturn, Mars and Jupiter included).

Crash Bandicoot: Neo Cortex, Tiny Tiger, Dingodile, Nina Cortex, N-Gin, N-Tropy, N-Oxide, Ripper Roo, Koala Kong, Komodo Brothers, Pinstripe Potoroo and Uka-Uka.

Miraculous : Tales of Ladybug and Cat Noir : Gabriel Agreste/Hawk Moth and Natalie Sancoeur/Mayura.

Transformers: Decepticons

Xenoblade Chronicles: Dickson

Ratchet and Clank: Dr. Nefarious with Lawrence.

Kid Icarus: Medusa, Thanatos, Pandora,

Threads of Fate: Valen

Ty the Tasmanian Tiger: Boss Kass and Karlos.

Teen Titans: H.I.V.E. Team, Mumbo-Jumbo, Blackfire, Brother Blood, Killer Moth and Slade.

Bat-family: Harley Quinn, Joker, Arkham Asylum criminals and Regime Team (Injustice : Gods among us)

Bayonetta: Father Balder.

Percy Jackson: Gabby.

Jimmy Neutron: Professor Calamitous and Beautiful Gorgeous.

Tak and the Power of Juju: Traloc, Pins and Needles.

Narnia: The White Witch.

Billy and Mandy: Jack.

Kung-Fu Panda: Lord Shen.

Earthbound: Giygas

Shaman King: Hao Asakura.

Fairly Oddparents: Vicky, Crocker and the Anti-Fairies.

Star Fox: Star Wolf Team and General Scales.

Soul Eater: Asura.

Devil May Cry: Vergil (CharlieCharly18's version)

Mario: The Wario Bros.

Fire Emblem: Medeus,

The Dragon Prince: Lord Viren.

The Bad Guys: Professor Marmalade.

Ninjago: Garmadon.

Demon slayer: Muzan Kibutsuji

Dead Space: Brethen Moons.

Zelda: Wind Waker: Ganondorf.

Fable: Wolf Among us: Crooked Man, Bloody Mary and Jersey Devl.

Puss in Boots: Jack and Jill.

Tiny Toon Adventures: Montana Max and Elmyra Duff.