|Nano Item||Rubber Pig|
|Voiced by||Rosearik Rikki Simons|
|“||Aww...I wanted to explode.||”|
GIR is Zim's robotic servant, and the deuteragonist of the Nickelodeon show Invader Zim. GIR's brain was made using a bunch of junk, and this causes GIR to be, in many ways, insane. When in public, he disguises himself as a dog. He's constantly disobedient to Zim, and often causes his plans to fail. Zim has tried several times to change him into a loyal SIR unit, but his efforts just end up as disasters.
When the Fusion invasion started, GIR left Zim's house and sneaked onto a S.C.A.M.P.E.R. that was heading towards the Darklands. GIR pressed a red button, causing the engine to be released, and the S.C.A.M.P.E.R. crashed onto a mysterious island. GIR and the crashed S.C.A.M.P.E.R .GIR can now be found in Forbidden Island . GIR gives several missions, though most of them are utterly pointless, involving collecting rubber pigs, bringing GIR Fusion Matter, and ocasionally defeating Fusions that steal his stuff.
GIR's ideas often cause the plans of other heroes to fail, such as when GIR tells the player to set TNT next to a Gooey bomb, which causes an even bigger explosion.
During the "Technical Issues (Part 4 of 4)" mission, Fusion Dexter re-programmed GIR to believe that Fusion Dexter was his master, so the player will have to defeat both Fusion Dexter and GIR.
- In the Zim Nano mission series, "Leveling A House," the player learns that a Fusion Zim has been attempting to mass-produce the extremely powerful Fusion GIR. This may account for the number of times that the player has to encounter a GIR Fusion in the game.
- GIR, despite being a major NPC, is rather optional; missions from other NPCs rarely involve him.