The one shot where it shows that Jack had green eyes
Alternate costume for Jack never seen in the show
defeated pose, laughing on the ground
"spicy! spicy hot!"
Jack O'Lantern's Origin Billy and Mandy's Jacked Up Halloween
The Grim Adventures of Billy & Mandy Wii - Jack Quotes
The Grim Adventures of Billy & Mandy Wii Story Mode-Jack
Jack (green) and some other characters during the intro of the TV series
In Billy & Mandy's Big Boogey Adventure, Boogey used the events of Billy and Mandy's Jacked-Up Halloween in a court case against Grim. However, he did not mention Jack by name, referring to him as "a guy with a pumpkin head"