Goddam, the Irkens from Invader Zim are just, like, God-Tier Alien Design. That perfect blend of Little Green Men and Insectoid Alien designs in a way that is both classic and uniquely recognizable and the whole concept of the PAK giving them that extra original Sci-Fi twist (And the PAK legs just look awesome). The perfect color balance between the green and the magenta of their uniform…. All the variety of faces and body types you can get within this very simple template. Really some of the best alien designs in cartoons!