Shadow Queen

The Shadow Queen, also known as the Shadow Demoness in her dragon-like form, is a character from Paper Mario: The Thousand Year Door. She is the main antagonist of said game, and she possesses Princess Peach into attacking Mario against her will.

Koopa Kart Wii
The Shadow Queen is a new racer in Koopa Kart Wii, where she is a heavyweight driver and can be unlocked by unlocking four Expert Staff Ghosts in Time Trials, the same method for unlocking Funky Kong in Mario Kart Wii. She has a speed bonus of 4 and an off-road bonus of 3, bringing her stat total to 7. If she uses the Albino Alligator or the Sword Speeder, which are the fastest vehicles in the game, she will have the fastest vehicle combos in the game.

Koopa Kart 8
The Shadow Queen returns in Koopa Kart 8 as the Shadow Demoness, and she can be unlocked by winning all 150cc Nitro Grand Prix Cups.