Spud

Arthur P. Spudinski is the best friend of Jake Long and Trixie Carter. He is extremely loyal, and will do anything to help them. Although apparently slow-witted, he often comes up with intelligent things to say at random times, much like the Scarecrow in The Wizard of Oz. He's actually a genius, but tries to hide it, as shown in "A Befuddled Mind", in order to live an easier and carefree life. According to "Half Baked", Spud has a tremendous fear of clowns that started when he was five years old. He also has an obsession with mermaids and dreams of becoming a 'Merman'.

Ultima role
Spud is under training in Sentinel academy while also helping out the Geniuses on security system due to his intelect level despite been lazy at all.