IG-101 was one of the two IG-100 MagnaGuards, the other being IG-102, that served as General Grievous's droid bodyguards aboard the Invisible Hand during the Battle of Coruscant. He was programmed to automatically learn combat and refined his combat skills in long training sessions with Grievous. Due to his training, he could wield two electrostaffs at the same time.
The two droids were present on the Bridge of the ship as Grievous gloated over the captured Jedi, Obi-Wan Kenobi, and Anakin Skywalker. Skywalker's astromech, R2-D2, was able to distract those on the bridge for Kenobi to use the force take his lightsaber back from Grievous, with Skywalker taking his back afterwards. Grievous ordered the droids to attack, with IG-102 focusing Kenobi, and IG-101 focusing on Skywalker. 101 was able to press Skywalker for a while, but the Jedi managed to find an opening in his defense and cut the droid in half at the waist, destroying it.
- Star Wars: Force Arena
- Star Wars: Episode III Revenge of the Sith (First appearance)
- The Prequel Trilogy Read-Along Storybook and CD Collection (Picture only)
- Revenge of the Sith Read-Along Storybook and CD (Picture only)
- Star Wars Character Encyclopedia: Updated and Expanded (First identified as IG-101)
- Star Wars: Build the Millennium Falcon 75 (Starship Fact File: General Grievous's Invisible Hand)
- Star Wars Helmet Collection 8 (Helmets: General Grievous; Highlights of the Saga: Kidnap of the Chancellor)
- Star Wars Helmet Collection 24 (Helmets: MagnaGuard)
- Star Wars: The Complete Visual Dictionary, New Edition
- Star Wars: Build Your Own R2-D2 57 (Droid Directory: IG-100 MagnaGuard) (Picture only)
- Star Wars Day-at-a-Time Calendar 2021 (Picture only)
- "Melee and Ranged Weapons" – Star Wars Encyclopedia
- "Anakin Skywalker" – Star Wars Encyclopedia (Indirect mention only)