JJ

J.J. is one of the three peaceful hobos that Finn and Jake confronted in the Desert of Doom in "The Other Tarts". He and his compatriots Grimby and Taddle steal some of the (poisoned) royal tarts from Finn and Jake. J.J. uses his rockets to escape from Finn and Jake and flies off with his Grimby and Taddle into the desert. The reason J.J. is a hobo may be that he spent all his money on the rocket boots

Appearance
J.J. appears to be a sentient video game machine, much like Beemo. Just as Beemo has the letters "BMO " printed on the side of him, J.J. has the letters "JJ". J.J.'s face has three eyes and he has a small crack next to his left leg.

Trivia

 * 1. Since it is known that robots like him and Beemo can't eat, he could have only been after the Royal Tarts either due to their value or due to his hobo friends likewise being interested in them.
 * 2. Finn made him and his friends evil by acussing them and make them wan't to take the tarts.