Based on this official Invader Zim comic that features Dib entering the Binding of Isaac, as posted the previous day on the Binding of Isaac subreddit: https://www.reddit.com/r/bindingofisaac/comments/3v5rhp/binding_of_isaac_refrence_in_the_new_invader_zim/ I haven't read the comic itself so don't ask me why this happens, I just thought it'd be fun to do in-game.

Dib replaces Judas, and thus has the same stats, but has his glasses, hair and longcoat which will remain regardless of what items you pick up. Also changes menus etc. to match.

There are two versions, the Lite version is purely visual and Dib will play exactly the same as Judas. The Full version replaces the Book of Belial with Number One and 20/20, like Dib has in the comic.

This mod is incompatible with mods that change or replace characters.

Installation:

Open up the downloaded zip file. Depending on which version you want, extract the contents of the Full or Lite folder into The Binding of Isaac Rebirth/resources.