Shunk Wugga was one of the many prospective members of the audience for Probing the Membrane of Science. His only appearance was as Dib's opponent in Battle-Dib. When Dib had tried to meet Professor Membrane while Membrane was at the studio of his show, he was forced to take a series of tests to be in the audience of the show, even though Dib was only trying to talk to his dad personally, not to be in the audience.
The testing process eventually led to Dib having to compete with Shunk in a battle arena. Shunk's original intent was to let Dib tie with him in the test, so they could both see Professor Membrane. Although Dib agreed to this, he accidentally won the first round, taking the lead, and Gaz ruined this plan by claiming to Shunk in between rounds that Dib had made fun of his oddly-shaped head. Enraged, Shunk quickly beat Dib in the next two rounds, and Dib was hauled out of the arena.
|Characters of Invader Zim|
|Dib • Gaz • GIR • Zim|
|Almighty Tallest Purple • Almighty Tallest Red • Ms. Bitters • Professor Membrane|
|Invader Skoodge • Keef • Minimoose • Tak • President Man • Roboparents • Lard Nar • Skool Principal|
|Adult Dib • Old Kid • Hobo • Alan • Meef • Skoolchildren|
|Mortos der Soulstealer • Sergeant Slab Rankle • Sergeant Hobo 678 • Shadow Hog • Chickenfoot • Sizz-Lorr • Gashloog • Willy • Iggins • Walton Chunky • Pigboy|
|Louie • Digestor • Almighty Tallest Spork • Almighty Tallest Miyuki • Bloody GIR • Cthulu • Cybernetic Kitten • Dinky • Little Timmy|