It’s Marik’s dark side that’s created by his hatred and took over his Marik’s body. He controls The Winged Dragon of Ra and The Millennium Rod as well.
E-123 aka Omega was created by Dr. Eggman in the beginning. For some reason, Dr. Eggman decides to abandoned Omega in the chamber in Sonic Heroes. Rouge decides to created an alliance known as Team Dark that’s join with Shadow and Omega to get revenge on Dr. Eggman.
A third member of Team Babylon known as Storm The Albatross. Also, he’s a bodyguard that’s always serving Jet The Hawk.
It’s Donkey Kong’s best friend Diddy Kong and known each other from Donkey Kong Country in Super Nintendo Entertainment System. Also, he has girlfriend name Dixie Kong.
A villain from Mario & Luigi: Bowser’s Inside Story. He’s not Bowser, but it’s his evil dark side. Dark Bowser plans to take over the Mushroom Kingdom and destroy Bowser And The Mario Bros as well.
Another of Sonic’s Rival in Sonic Riders series that’s trying to be better than sonic by being the best. Also, he’s the leader of Team Babylon and has two members known as Wave The Swallow and Storm The Albatross.
A smart Dinosaur that could learn anything quickly than humans, but they’re really dangerous for humans and herbivores.