English: Ian James Corlett Italy: Monica Bertolotti Poland: Magdalena Korczyńska Romania: Cristian Balint
Mark is the richest kid in Single Town. He is Danny's main rival who makes challenges about different activities at most when he is at the school. Mark uses his money to make friends or take success. Sometimes he gets close to the popular kids just to make sure that he is in the crowd. He also has a rivalry with Chris, possibly due to his association with Danny.
He has blond hair, he wears a red pullover and blue pants.
He can be viewed as the main antagonist, because he revealed the secret of the MBC which caused them to be banded and leaving Single Town defenseless from the Spoilers.