Turbo Super Stunt Squad

Hey there! Just a little info: You may notice that Skidmark is not available from the start. You have to unlock him. He should unlock naturally as you play the game. I'm not 100% sure what the requirements are (no in-game notification was given), but I believe it has to do something with completing objectives with each racer.

Personally, I was going for all the characters' 20 objectives achievements and suddenly noticed Skidmark was available when I had 20 objectives completed with my fourth racer.

You can also enter a cheat to unlock him. Achievements are not affected with cheats. Go to the extras and enter the promo code to unlock him (just a sequence of character portraits):

Skidmark, Whiplash, Turbo, Burn