Over the years a handful of companies have created licensed Invader Zim plush toys, particularly in the early years when the show was still airing and shortly after, with one of the earliest being a set of three released by "Fun 4 All" in late 2001-early 2002; this set included Zim and GIR without their disguises, as well as a second release of GIR with his dog suit. Smaller key-chain sized versions of these three designs were also released. Four large cushion-sized plushes were released around this time as well, featuring Zim and GIR both with and without their disguises.
Additionally, a number of smaller plushes were released including: Germ fighting Zim, germ covered GIR, Piggy, GIR with a hot dog, and Doggie GIR. Unsurprisingly, the GIR plushes appear to be the most popular.