|Notable facts||Enormous Head With Band-Aid On It|
|First appearance||The Nightmare Begins|
Invader Spleen, seen in The Nightmare Begins, was the second Invader called forth in Operation Impending Doom II's Great Assigning to get an enemy planet, where he impressed the Tallest with his height. In episode Hobo 13, he was seen again sitting at a table nearest Almighty Tallest Purple, but was only seen in background shots. Much like Invader Chin, Spleen is named after a human body part.
Invader Spleen has a small body, but an extremely large head to make up for it. How his tiny body supports the weight of it is unknown. Spleen is the only Irken seen to have a band-aid, his 'Battle Scar', but is unknown how he acquired it. Due to The Tallests' clear display of admiration at his stature, it is possible that Spleen's head size and the minor injury are somehow linked. Like his body, Invader Spleen's PAK is unusually small. Invader Spleen was assigned to a unknown planet, and probably completed it, as he was with the Tallest when they watched Zim on Hobo 13, probably after the Organic Sweep of his planet was completed. He is one of the very few Irken to have pink eyes and not ruby.
|Invader Alexovich • Invader Chin • Invader Dooky • Invader El • Invader Flobee • Invader Gooch • Invader Grapa • Invader Groot • Invader Kim • Invader Koot • Invader Krunk • Invader Larb • Invader Lardnar • Invader Nen • Invader Pesto • Invader Poot • Invader Sklud • Invader Skoo • Invader Skoodge • Invader Skutch • Invader Slacks • Invader Slant • Invader Sneakyonfoota • Invader Spleen • Invader Sploodge • Invader Sqood • Invader Stink • Invader Tenn • Invader Tim •Tak• Invader Yoogli • Invader Yuli • Invader Zee • Zim|