Nice!

One grammatical error: "monitors and keeps check"

The ending is sad. Dib grew up when Zim wasn’t looking. At least he didn’t grow old and die or anything.

Excellent story.
I'm crying now ToT
Keep up the good work.

Zim feels homesick for Irk and yet, Earth still has done similarities, it's interesting because of that he tolerates our world.

Invader Johnny Signing Off.