Jack Brewer is the new kid in town, whose foremost hobbies are martial arts and skateboarding. He learned karate from his grandfather, who also trained Bobby Wasabi for the latter's movies. Jack is loyal to his friends and inspires them to give 110%, just as he himself always does. He cannot stand the scent, or taste, of blue cheese. Jack also has a phobia of clowns, which he confronted in "Boo Gi Nights". He has great respect for his elders, particularly Rudy, but dislikes being told what to do and when, he also dislikes being shoved away. In the episode "Buddyguards" it is revealed that Jack can play guitar. It is revealed that his last name is Brewer. It is shown that he gets jealous when Kim goes around other boys shown in the episode "New Jack City". Jack has skills in martial arts that far surpass his friends (and enemies). In "Karate Games" Kim tells Jack that he is amazing and then they almost kiss. Jack likes Kim, and he later asks her out on a date in "Kickin' It On Our Own", although nothing seems to have happened since. Jack asks Kim out on a real date in the episode "Two Dates and a Funeral". Jack and Kim also kiss in the last episode of season 3 and one of the episodes of season 4.