Mr. X - Brickipedia, the LEGO Wiki

Mr. X is a character who appeared in 5712 LEGO Stunt Rally. He is the World Champion and current owner of Stunt Island. He speaks with a slight British accent. He drives the X car, considered the best in the game. He also provides hints and tips to the player.

The Riddler - Brickipedia, the LEGO Wiki

Drax - Brickipedia, the LEGO Wiki

Mister Fantastic, Brickipedia

Thor, Brickipedia

Phoenix, Brickipedia

Dr. Doom - Brickipedia, the LEGO Wiki

Brickipedia

Croc Henchman, Brickipedia

Nindroid Warrior - Brickipedia, the LEGO Wiki

Vermin - Brickipedia, the LEGO Wiki