Cross-post from my Deviantart account--

This started out as a rough doodle while I was waiting for a plane to come in at the airport--I liked it enough to ink and color it.

My favorite headcanon is that as these two get older, Dibs gets progressively more cynical and tired of Zim's still-constant yelling and ego, and gives up on trying to stop him from invading the Earth because Zim is just so bad at it.

Invader Zim, Dib © Nickelodeon